Chevy 2500 6.6L GAS Engine (L8T) **HEAVY MECHANIC Review** | How Good of an Engine Is It??

[@SuperSnakePlissken]

I have a fleet of 11 trucks and I have pretty much converted them all over to gas over the last three years from diesel and it comes down to the fact these big gas motors can pretty much do what diesels did 15 years ago. I tow typically between 15,000 pounds and 20,000 pounds regularly and a 3500 with the gas engine does everything I need. Less maintenance about the same mpg towing and it cost me roughly $12,000 less per truck for my entry cost. I’ve got four 7.3 L F350 gas trucks and I now have five 3500 6.6L Silverado‘s with two F 450 diesels for my super loads. These gas engines are amazing. Concerning the oil burning issues we haven’t had any issues there. I know a lot of that is related to the tree hugging liberal commie bullshit that they put on his engines these days.

[@cruisingaltitudepilot]

I love the last part of your review 😂 this country is completely doomed my friend. We’re turning into China real quick.

[@scramjet4610]

They aren't tree-hugging. They are power-mad, absolutely addicted to the pursuit of power. They don't give a damn about the trees. That's just a pretext to justify their power grabs.

[@lfelipem21]

Nice review!! Would you recommend a GM 2500 gasser over a Ford Godzilla?

[@SuperSnakePlissken]

@@lfelipem21 I would recommend them. I have had no issues with my 6.6L gassers. My 6.6L trucks are SLE's which have a better interior than my XLT's. You can get more truck for about the same price with the GM's over the overpriced Ford's. I have XLT's across the board on my Ford's and lets be honest those interiors are cheap as hell. Work wise they're the same and get the job done. So, if you are getting one truck and you want more creature comforts go with the GM truck.

[@bigcartoonyIIV]

11 trucks, what do you do for a living?

[@crooked308]

Running a 2021 6.6 gas custom its a solid work horse. No oil issues tow bobcats and all kinda stuff its a simple solid easy to work on truck.

[@GettysGarage]

awesome to hear!

[@nhlcfl7733]

Great to hear. I also have no oil burning with mine as well. I think that story is overblown. If interested, read my story and about the Oil Catch Can.

[@houstonbrown3450]

I have a 2011 2500hd gas not to good on fuel economy pulling a GN horse trailer,,and how about the 2022

[@Stoff1]

What mpg are you getting towing, 6-8?

[@nhlcfl7733]

@@Stoff1 with my 31 ft. 10K lbs. trailer, I’ve experienced 7-8.5 US mpg. I can confidently write this because I’ve noted this to myself (Notes App) from numerous trips.

[@cannonj12]

I've got a 2023 6.6L L8T with around 14,000 miles on it at this point and really like it. I haven't had any oil consumption issues. I have several Duramax trucks and wanted to get into something simpler. I think the fuel mileage, which is similar to your test truck is pretty good, considering what the vehicle is. I've towed well over 20,000 pounds with it, and it's fine. It won't get up and go on the road loaded like any of the Duramax trucks will, but it easily can get the job done. Thanks for the great review.

[@gramgamble437]

Any updates about the burning oil?

[@CMya018]

I've got a '22 3500 gmc with the gas. I missed the 10 speed by a year but don't mind the 6 speed one bit. I'm not quite 30000km. No issues. Great truck so far! Plenty of power for me! Ive never driven the 7.3 ford, but for the price difference I didn't need to. The Ford being $7-10G more with comparable options. If I were to spend $7-10G more, I'd just get my same truck with the Duramax.

[@mikestewart5387]

I have this truck in a 2021. Love it. No oil issues. No issues to speak of at all. We do tow quite a bit in the summer and perform maintenance every 5k miles. 33k miles and we love it.

[@kenhunsucker1700]

Got the same model, love it no issues

[@816morato]

Ram fanboy, what do you expect

[@sandasturner9529]

Well, it's definitely good news but, that's still to early to tell about the quality of the engine. How about updating us all when you get above 50k miles.

[@nhlcfl7733]

I have the same vehicle with gas engine too since June 2020: Love it, no issues worth mentioning and fortunately no oil burning that is being claimed. Actually it runs buttery smooth (shifting and all) and one can hear a nice, yet muted by emissions system, muscle car roar when pedal is punched. I installed an Oil Catch Can to mitigate issues in the future for what are expected “direct injection” systems and yes, my catch can has collected a like brown soupy oil cocktail and so, it reducing what will otherwise cause building issue(s).

[@nhlcfl7733]

I agree, no oil burning with mine as well. I think that story is overblown. If interested, read my story and about the Oil Catch Can.

[@melrose9252]

I have a 22 for over a year and so far no complaints. Changed the oil at 4500, 9000, and 13000 with no noticeable consumption. I have 14k on her now. I pull a 12000 fifth wheel and get about 7.5 to 8.5 depending on wind. It pulls it with ease. Nothing against the diesel fanboys but 10k premium at purchase, extremely expensive oil and filter changes, DEF, diesel price sabot a buck high than unleaded and major expense if repairs are need out of warranty, I just passed on the diesel. No way to make up the cost and my gasser pulls pulls my trailer very nicely so I am not sure the diesel would ever make up the cost. So far I am well satisfied with this truck.

[@brandonwebb2820]

You must be on flat ground running 55-60 to get that fuel mileage towing.

[@kevb9578]

I’m at 97k miles on my ‘22 and have no problems at all. It uses about a quart between oil changes. I love it

[@tompiper3]

It's going to be like the 8.1 vortec, people complained about that big block being slow and burned oil. But they outlasted power strokes and pulled anything you put behind it like they were empty.

[@johneburke1]

268k miles on my 8.1/Allison truck. And just made a 1,000 mile read trip pulling my 30ft camper

[@weegeemike]

I love the 8.1 and the ol 454...my dad owned a 96 GMC K2500 with the Vortec 454 and that thing was a beast. Not super fast but man she could torque her way out of trouble with ease...unfortunately my dad sold it shortly after he sold his business in 2021 as he didn't need it for work anymore and the thing got 10 mpg so it wasn't efficient enough to run around town with. It also had a slight misfire due to a messed up valve in the heads after my stupid cousins borrowed it and over revved it Myself nor anyone in my family has ever owned an 8.1 but my dad's buddy had one for years and the difference in power and smoothness made driving the old 454 feel like it had a 350 under the hood lol.

[@Iamthestig42069]

The 6.0 was better. The 8.1 had oiling issues towards the rear of the cam. I’ve seen a couple get replaced. I fear the 6.6 will be just like the 400 with those steam ports in the heads

[@a990dna]

I have a 8.1L in my 2002 Express 3500 LWB. 35K miles and zero issues.

[@toofastnobrakes]

Would be really cool to see them bring that displacement back in a motor like this.

[@Agwings1960]

I can remember when 6.6 liters was a mid sized engine, plus putting oil in your engine every time you filled up with gas, was very common thing, with the old Chevy 454's

[@MarkandCassie]

Swapped from a Ram 2500 with a continuing diesel issue. Love it so far and no oil consumption at all. Also did my 1st oil change and it was completely a pleasure compared to the diesel and much much cheaper. 8.5MPG running around Louisiana and Texas pulling a 9k lb 5th wheel. About to add an bed tank to bump up the fuel capacity for long trips. So far I like it. No DEF and no expensive ass diesel. 2023 GMC Sierra 2500HD.

[@GettysGarage]

The GMC's are beautiful looking trucks! and I can't blame you for dropping the diesel. when those things start having emission issues it can be an absolute nightmare.

[@michaeljordan4571]

@@GettysGarage hey why don't you bring up carbon up intakes being a problem in the Diesels? they are DI as well.

[@ivonivan1169]

@@michaeljordan4571 that's not an issue with good diesels

[@billybobbob3003]

@@GettysGarage chevy letters would honestly look better in the middle of the grill

[@michaelbenoit248]

No loss of power over time, & if the motor blows u can put another into it for the savings of not having a Diesel with constant issues, & DEF to add.

[@brucejones3150]

I have a 2024 2500 HD Custom, 4x4 with the 10-speed Allison transmission. 6,000 miles, no issues with excessive oil consumption and averages 13 MPG. Bought it to pull a new boat and haul miscellaneous stuff. I love this truck.

[@scottjeans6184]

Black smoke=gas, Blue smoke= Oil, this is on gas engine at least.✌️ Love the content...I am an auto mechanic mostly gas engines, the largest for me would be the "Duramax" or "Power stroke".

[@matthewhouser2365]

Right? This is what i was just thinking when he started it.

[@MikeinNJ]

I plow with a gmc 3500 SRW pickup 6.6 gas. It’s the only truck I drive and I love it. It’s a beast. I’ve been out for 10-12 hours and only used half a tank of fuel that’s pretty good In my opinion

[@rygi23]

‘22 6.6. 14-15 mpg combined when empty and hasn’t consumed a drop of oil in 20k. Love this engine.

[@hermanmuller]

I agree. I have '21 Custom 2500HD 4x4 and highway I get 16-17mpg, around town I get 12-13mpg and towing our 6500 lbs travel trailer I get 10-11mpg with ease. I've now done about 24000 miles. No oil consumption and not having any troubles with power. I'm in north Georgia so do a mix of flat and mountain driving. I love the simplicity of the trucks internal layout compared to other competitors. This is a simple truck that I think will last for a long time. b.t.w. when towing I lock out the 6th gear and only allow the truck to use the 5 gears. I also tow around 65-70 mph on interstates and use the cruise control most of the time. This is better than what I managed to get from my previous truck, which was a Ford F-150 with the coyote engine.

[@chassbunnbuildingllc7231]

I’ve got the same truck in the custom model. It’s a great pulling truck for around 8 thousand pounds. I’m a contractor so I like the simple interior and the seats sit as good as a Ram or F250. It definitely rides better than a 250! Love mine and zero issues!

[@nhlcfl7733]

I agree, and no oil burning with mine as well. I think that story is overblown. If interested, read my story and about the Oil Catch Can.

[@dwshell6154]

I have a 2021. It doesn't burn oil. very smooth running truck. I am a contractor and carry a couple thousand pounds of tools etc. I get 14 mpg city and crowded freeway driving.

[@cliffordmontana4562]

It does ride better…because it has a MUCH weaker front end than the Ford. Plus it’s just so damn ugly. I know they’re good trucks, but I’ve never seen an uglier truck in my life. It makes a Tundra look beautiful, and that’s saying something.

[@brandonj6548]

​@Clifford Montana I traded my tundra for one and yes my 15 tundra looked better but the chevy is awesome in its own right. It looks ridiculous and I love it.

[@cliffordmontana4562]

@@brandonj6548 Congrats on your truck. The Chevy heavy duties do ride nicer than the fords.

[@trytotravel4713]

I just subbed because you keep your personal life out of the reason why I wanted to watch the video. Every other video people usually go on tangents with their life.

[@buddha1423]

I have a 2020, 2500 Silverado with the 6.6 Gas engine that I bought new in August of 2020. Today it has 77, 378 miles on it and 99% of all my driving is without a trailer. It’s more of a rough riding station wagon than a work truck. The mileage works out to be about 12 mpg around town and around 16.5 mpg on the highway. What I found is that the different fuel blends winter / summer that we get in Florida negatively affect my mileage more than any other factor. Scheduled maintenance is by the book and my oil consumption is exactly one quart every 5,000 miles. My original Goodyear tires lasted 62,000 miles, (I pushed the mileage), and the only item outside of standard maintenance that needed repair was one of the seat vibrators for lane changes quit at 5,000 miles. Nothing else.

[@StephenMadden-b7d]

Just an update to my above comment. As of November 2024, the truck has 133,200 miles on it. The vehicle still gives me the same mileage and the same oil consumption. The original Goodyears were replaced with Michelin LTX, and there are now 71,000 miles on them. I can get another 10,000 miles before replacement. Front brakes have 68% remaining and the rears have 79%. Outside of following the manufacturer's severe service maintenance schedule, the only cost has been to replace the cap on the top of the windshield washer bottle for $12.95. Nothing else has broken.

[@JeremyR7902]

@@StephenMadden-b7dthank you for the update. Looking at purchasing a 2021 with 50k miles and this review helped.

[@StephenMadden-b7d]

@@JeremyR7902 I have 133,600 miles on it now. So far, the only part I have had to replace has been the cap on the top of the windshield washer fluid bottle. Cracked and fell off.

[@jimingvaldson7076]

Nice video. I own a 2021 3500HD. I am very happy with mine. I often pull 15,000 lbs on long hauls. No lack of power at all. Mine has also not had the oil consumption issue. With that said I have already ordered the 2024 for the reason of stepping up into the 10 speed Allison transmission. As for the fuel consumption, that is mixed for me. But not bad either imo. Not good if you are just buzzing around town. I'd say around 4-5mpg. Yeah take the civic. Just the empty truck though over the highway and if I keep it just over 60mph I'm getting around 16mpg. Considering what I'm driving I consider that not bad at all. Pulling the 15-16k I get between 9-10mpg. imo that too is not bad at all.

[@GettysGarage]

Pulling 15k at 9mpg is actually really good! It is interesting why people are complaining so much about the fuel consumption. Last time I checked the 6.0 was not very fuel efficient either lol but its good to hear that the oil comsumption isnt an issue with your truck!

[@jimingvaldson7076]

@@GettysGarage I have over 22k miles on the truck. Not one issue with the motor as of yet. Only issue was one cold weather emissions light issue this past winter. Went away the same day. I am in N. MN uSA and our winter cold can cause issues of it's own.

[@jpbarley]

@@GettysGarage I have a 2015 2500HD quad cab short bed with the 6.0 never checked fuel on paper but the dash says 10.5 average. I did get up to 15 on trips but that was babying it but all in all 10.5 so I would be happy with 12 lol

[@wildbill23c]

@@GettysGarage Around 9mpg was a good day when towing a 21' travel trailer with my 88 460/C6 F250....usually it was around the 7-8mpg mark all the time when towing....so 9mpg with a 15k load is damn good. People that complain about fuel economy in a truck shouldn't have a truck in the first place.

[@CGunRanch]

I had a ‘16 GMC 2500 6.0 that got around 10 empty and 9 towing a stock trailer full of horses or cattle. I sold it because I have three other trucks that all stay hooked up to a trailer. They are all older diesel trucks (03 & 06 Dodge 2500s and an 04 Chevrolet 3500). These old trucks are solid old diesel trucks, but I kick myself in the ass daily for selling that GMC. It was just an easy to get along with truck that was easy to maintain and you never had to worry about adding anti-gel to it in the cold winters. I think this 6.6 is pretty impressive!

[@radamus210]

With you on the front end styling- Just got my order picked up a few weeks ago for a GMC 2500, 2024, and I'm liking the update to the front end/interior styling. I'm moving from a 2016' 2500, 6.0 and super stoked for the Allison upgrade. Not happy to hear about the oil consumption. praying this is not an issue. We're an all GM fam and I don't even open the hood. My service guy does that, when I go for oil changes. So TBD Mileage - I've gotta say that my 6.0 in my 16' has been incredible compared to anything I'd owned previously. A few trucks ago I had a Chevy, 3500 with 7.4 to pull my boat. i never bested 11mpg empty and hooked to anything, 8mpg all day long like nothing was behind me. I then bought (please lord, I have sinned) an SD250 Pherd - with a 5.4 was it? the motor everyone raved about? that every single one had to have the manifold bolts replace because htey broke, that job nobody wanted to do and cost me like $800 - that was a gutless piece of shit that couldn't pull it's own weight and still got the mileage of my 7.4 - on a solid front axle to boot that drove like a 1965 Power Wagon. A few Chevy's later and I have to say, my 2016 HD, best g'damn truck ever, and I've been buying trucks since the early 80's - and at heart, a MOPAR guy. But today, long in the tooth, loving a smooth ride, but a brute when it comes to hauling a load and ardent hater of diesel in a pickup - Chevy is just my thing. i base this solely on "who has left me walking the least" ... and it's Chevrolet. I've owned them all, new and used for a hell of a long time and that's just my experience. I'm only loyal to "who has fucked me the least" and money has nothing to do with it. I traded a used shotgun for a Pinto once - one of the best damn cars I ever owned which by all accounts is really fk'd up.

[@cliffordmontana4562]

I hate to break it to you, but it’s not a real Allison transmission. It was designed mostly by Ford, and GM just slaps the Allison name on it. I’m sure it will still serve you well, but it is not a ground-up design by Allison.

[@czealtamahawk1228]

Do you have the videos to n prove it or you just read from a stream sewer

[@robertfelix5419]

That’s the best Gawd Dammmm review I’ve read Sir !!! Appreciate the honesty & as the owner of a ‘2015 GM Duramax ….. I will 100% agree it’s ( DEF delete ) the best thing I’ve owned in over 40 years driving , it tows my 5th wheel like it’s not even there & while it did suffer a head gasket it’s the only big issue , currently about 275K on her, I’ll be in the market for something new in a year or two hence the review searches !! 👍😎

[@billoliver5098]

I have this motor in it 18 ft box truck since 2020 and it hasn't given me one single issue, it's a great motor, and I have no issues with oil consumption

[@kcspeed9980]

We have a 2023 2500 and could not be happier, just passed 5k miles and oil consumption has not been noticed, new it looked like it was a little low but besides that it’s been rock steady, just replaced. Fuel economy is 13.7 combined, so our 2020 4Runner gets 15.2 so not much worse, and the 2500 will get 16 on the highway if you stay below 75. One major difference we have experienced with the 2500 were the brakes, it stops better than any pickup we have driven. Interior is fine for us and our LT Alaskan had all the options we wanted for less than 60k, dodge and ford were 6k more. Can’t wait for the new racing season and start towing regularly.

[@GettysGarage]

happy to hear you are enjoying the engine! everyone in the comments who owns a 6.6 gas seems to be getting very reasonable fuel mileage. also happy you are not consuming any oil!

[@TonkaFire2019]

Yeah 2017 taco getting 15 to 16 combined, waiting for the 2024 to come out. Not a big deal for mpg loss.

[@steveg5524]

Your new 2500 is getting better mileage than my old Gen III 5.3L Silverado that lives in the Palmer-Wasilla and Anchorage areas. Glad to hear it's doing well. :)

[@kcspeed9980]

@@steveg5524 It’s used currently in NYC quite regularly, 2-3 days per week which hurts economy, getting 12mpg on those trips, but yeah not much different than 4Runner or Tacoma. Like I said if you keep it under 70-75 on the highway you save like 2 mpg. That being said I love how this truck drives on the highway, we were out in Pennsylvania where they have 75 mph speed limits and that truck just motors down the highway. But if you average 85 be ready to see low 13mpg.

[@KTB3007]

Brakes are super I agree - 5K kms so still breaking in here.

[@mchammer9025]

Love my 22 Chevy 2500 custom, great capacities across the board, tranny is ah but it’s proven so not worried about it

[@thomasmello7176]

I owned this this truck for two years in the 3500 platform. I liked it pretty well had no issues pulling my Rv around Michigan. Took a trip out to Wyoming and Colorado besides paying out the Ass of gasoline it did great pulling 11k in the mountains. I did upgrade to a 3500 Ram with the Cummins and I love it. Been a technician for 27 years and this was my best choice for me based on what's out there for HD trucks.

[@GettysGarage]

ram 3500 Cummins is probably the best HD pick up truck on the market right now.

[@jacobsebastien3910]

I like Ford an Ram heavy duty trucks because of the solid front axle. Stronger an less chance of breaking

[@danc7806]

Do the new rams use u joints on the front axles? Love my chevys having cv’s. So many issues with fords front axle u joints plowing snow

[@ChristianCotney-v1u]

@@GettysGarage Hope they’ve fixed the transmission issues.

[@magnumcipher4971]

The oil burning issue has been a thing with GM since the introduction of the OG LS-1 in 1997. I was there.

[@ans05]

Piston rattle and all 😂

[@dustytravels9458]

Since this video was published just 3 weeks ago, when you said "we have this brand new Chevy truck"... I was expecting you to talk about the 2024 with the 10-speed trans !

[@seanwelch962]

Enjoyed the analysis. I bought 22 new last july and have pulled 3000lb pontoon and 2 horse trailer with hogs. I love my truck and its performance. I average 12 MPG with both the trailer and the boat. And average around 16 MPG driving 65-75MPH. Fairly flat terrain, mostly highway. Have even gotten 19.2 on 50 mile range once. And I haven't had oil usage problem either. Thanks again for video

[@syndicatemotos7534]

I bought a 2023 6.6 2500 in December of 2022 use it to tow daily never had an issue with oil but babied it for the first 1k miles

[@dantimber]

I like the truck and test drove a 2021 with this gas engine. It felt like the 6-speed transmission held each gear a second too long if that makes sense. The 10-speed should help with acceleration and towing keeping the engine closer to peak power when needed. However the oil issue is not acceptable. I'm going to wait until it's fixed. I've read the engine was designed by Navistar if that's significant. I'm sure glad you made this video. Thanks!

[@redline455]

Hello. The engine is an LT based powerplant which is an evolution of the LS V8 from a few years ago. The LS/LT is one of the most proven and rugged gas engine platforms ever developed. It is not in any way co developed with Navistar. Ford used Navistar for their Powerstroke Diesel engines from 2003.5-2010 and it was an absolute disaster for them. Also, you very right about the 6 speed feeling a little sluggish with this engine. I feel also that it holds the overall performance of this truck back. The 10speed should change that. Now I'm wondering what 10 speed they will use. Is it the 10 speed from the 1/2 tons that was co developed with Ford, or will it be a version of the 10L1000 that's behind the Duramax. Let's hope for door number 2. Cheers.

[@georgehofgren6123]

I can't imagine they put a tranny from a half-ton truck into the 2-350s. That would be ridiculous as the tranny is the most important upgrade from one to the other. Let's hope i'm not wrong. Interested to see what the 10spd does for fuel mileage ~

[@jordanhill1559]

I am on my 2nd 6.6 both been great motors if your towing 14,000 and less this motor will do fine, and as a daily driver the fuel mileage wont hurt your pocket too bad for the size of the truck

[@brandondannys-menary3678]

What did you average roughly?

[@jordanhill1559]

14 -15 litres to a 100 , 400 litre slip tank and some tools

[@nhlcfl7733]

I have this same Chevy 2500 vehicle with the gas engine and since June 2020: Love it for many reasons including the the AutoTrac differential (pseudo AWD that is great for winter driving) and the long standard bed box along with my purchased GM made Side Mounted Bed Storage Boxes. No major issues worth mentioning and no oil loss/burning to any degree and according to my dipstick, it never goes down enough/measurably where I find the need to add oil between oil change intervals. Sure, it has some piston blow by like any engine and it’s fair to mention that Direct Injection systems have their advantages and disadvantages, yet I installed an Oil Catch Can (I now realize how this is a long term wise investment) and it really works (I find 1/2-3/4 cup of a soupy mixture of oil+gasoline in the can approx. after 5000 km of driving). Engine and Transmision for me actually runs buttery smooth (shifting and all) and one can hear a nice yet muted by emissions system “roar” as in a muscle car. Oh, and my gas mileage (I switched to a more aggressive AT tire as well) is 14.5-16.5 L/100 km (14.3-16.5 us mpg) unloaded (best was 13.7 L/100 km) and driving respectfully on the highway during spring-summer-autumn months (winter is different because I put the AutoTrac ON for that season to be safer and run studded winter tires and also idle a lot more like most everyone else; in Alberta, eh!).

[@MarkandCassie]

Which oil catch can you using?

[@nhlcfl7733]

@@MarkandCassie Thanks/merci for your question. Being in the industrial filtration business for 25 years now, of course I want the best, yet I settled on the Mishimoto unit with the optional longer can (don’t really need a longer can I found out). What I found are oil separation technologies which I would not ever say they’re at 90% or better at removing the soupy oil/aerosols, but at least they certainly work and it’s measurable. Mine captures a 1/2-3/4 cup after ~5000 km. I did consider the J&L mesh technology and I am familiar with mesh pads being in my industry and they have good instructions, but settled with the Mishimoto MMBCC-CAMB-16PBE (yes it also works with Camaro engines as you will find).

[@KTB3007]

HD’s don’t have autotrac

[@nhlcfl7733]

@@KTB3007 please read more about the completely revised for 2020 GM/Chevy newer HD trucks. Most models like my LT do have AutoTrac as an option and mine simply does. Thank you.

[@KTB3007]

@@nhlcfl7733 sorry Robert - that is new and my 21’ Alaskan WT does not nor did I see it as an option when I ordered it unfortunately!

[@truckingoover]

Just got done plowing with 3500 Reg cab 3500 (8hrs) 6.6 gas today. It’s a beast no complaints and my daily is a new L5P, this engine is making me question if I need another Diesel next trade

[@adamedwards4305]

I've got 22k miles on my 2022. No oil consumption issues. I've averaged 14.5mpg over the life of it so far. Super happy with it.

[@rgs13chob]

Do you use regular or premium gas on it?

[@adamedwards4305]

@@rgs13chob regular

[@TheSTARairSoft]

Same I’m averaged at 14.5 using 87. 64,000 miles so far. 2020

[@savagespeed4104]

I have the 2024 with the 10 speed transmission. Only 800 miles on it so far so I hopeful this with be a good work truck for me. So far it’s good.

[@dustyroads834]

I have a 2022 GMC 3500 with this motor. 18,000 miles It’s loaded every day with a welder, 100 gal fuel tank numerous tool boxes. About 1,500 lbs I would guess. It’s never been on a highway. Always secondary roads and I’m getting 17 mpg unless it’s real cold out. No oil use and no squeaks or rattles. She effortlessly pulls up and over hills with no down shifting at 1,200 rpm. Love this truck. ( so far )

[@krisfurr2948]

Iv got the exact truck but a 2023. I bought it with 13 miles on it. I tow a heavy load of building materials at least once per week and Iv never had an issue with burning oil. I get about 7000 miles per oil change. This truck is beast for towing, Iv threw a lot at it and it has no problem pulling it.

[@michaelthompson3617]

How much weight do you tow?

[@timothyroberts3371]

Have a 2022. Love it. No oil issue. Have seen many say mpg gets better after 20k miles. I am at 12k miles and have seen a steady increase in mpg over this last year. Average around 15mpg right now. Pull a 34.5 ft TT every few weeks - no issue. So far I love this truck.

[@medicbrndn]

What MPG you getting?

[@timothyroberts3371]

I vary between surface street and freeway driving and on this tank I'm right at 15. If I get a chance for a straight up road trip on all highway I've had as high as 21.6 so far.

[@carlitoswayz-Okan]

Im buying this truck today. I went to compare to the F-250 and they said they can sell it but theres a recall on the ford and cant take it off the lot until the first quarter of next year lol

[@timbertrans]

Great video. I almost bought one of these last fall but opted for a 7.3 ford instead . Isurprised your not doing better mpg the near or at sea level. Here in rockies im getting 14-16 mpg but got to baby it to achieve that. Iguess the 10 spd in ford was what made up my mind and I'm happy with that; thanks

[@arcadiaoutlaw]

Nice review, glad to see in comments that folks aren’t having the issues mentioned. Direct injection will have issues down the road once carbon starts building up on intake valves. One quart of oil would be acceptable at say 5k miles with towing. Todays diesels just don’t seem cost effective at all, sure they’re powerful but too many problems and expensive problems.

[@rickrochell2571]

Just bought 2024 6.6 and love it! Thanks so much for the great info..

[@hossbarker3523]

My big 2021 performs great whatever whatever I wanted to do and it does not burn any oil.I had it on a 4,000 mi trip and it did everything I wanted to do and more. Hauling trailers no problem that's good stability

[@bryce1916]

My 2003 6 litre has been very reliable and 21 years later on the original engine I still don't use any oil between oil changes no matter how hard I work it ,I have the Lq4 and it is the iron block .They had a good thing going with these .They need to get back to basics and build what used to work .

[@tazzthedoodle7861]

LQ4'S ROCK

[@pryme2013]

I have a 22 Silverado 2500. I’ve heard reports of oil consumption and I’ve heard of people not burning a drop. I personally have noticed no oil consumption. One theory I have is how the trucks are treated from day one. I personally plan on owning mine a very long while so I babied mine big time and was very methodical in how I drove it. It had 6mi on it when I took delivery and I did have to take it on the fwy the first day but I varied my speed and never went over 63-65 and would let off a bit on occasion and so on. That was the first 100 or so miles. Then I did lots of varied speeds around town and only did short trips of under 10mi on the fwy for the next 600mi. I never went above 2,800-3k rpm. I changed the oil at 780mi. I again changed the oil at about 3k miles and have only taken it up to maybe 4,500rpm once. Mainly it’s under 3k. I didnt need to tow until 3,500mi. So for me, that seemed like a logical break in. Others can do what they want. Mine burns no oil.

[@matthewcaughey8898]

It’s luck of the draw really. GM uses some really cheap, garbage grade parts for their V8s, you might have gotten a Monday or Tuesday engine, most it seems are slapped together on Thursday or Friday afternoon with quota approaching and nobody wants to work on Saturday or Sunday to catch up

[@pryme2013]

@@matthewcaughey8898 Can you link me to where you read the use “garbage grade” parts in their engines? I’d like to learn more. Thank you.

[@juanmore62]

I have a 2020 6.6 that I pull a 31’ twin engine boat with. Weighs about 11,000 lbs with trailer included. About 8 mpg while towing but I average 14.3 around my home town. (Aransas Pass Texas. I get 16+ mpg on Hiway running from here to Dallas. 350 miles at 70-80mph. I love the truck. I feel it pulls way better than the most loved 7.3 power stroke. About equal to a 5.9 Cummins with my 2016 Duramax better than all that I’ve had. Only trouble I’ve had is I threw a ESC code in the last month. But that don’t seem to have any effect. If I had to do it again, I’d buy another. I have zero issues on oil burn.

[@scramjet4610]

The oil burning in Chevrolet goes back a long ways. I bought a new 1987 3/4 ton V8 Chevy pickup, and it burned a lot of oil right after I drove it off the dealer lot. When I complained and brought it back to the dealer, the Service Department diagnosed the problems as worn valve seals. When I asked how can the valve seals be "worn" with only about 100 miles on the truck, the Service person said, "Valve seals are like light bulbs; sometimes they last a month, and sometimes they last years." After they replaced the valve seals, I never had an oil consumption problem again.

[@Nathan-kq2ec]

I’m getting 15 or 16 mpg unladen, with my GMC and 11 while towing my 7500 pound camper. I’m happy. The key is to drive with a light foot, and keep RPM’s down.

[@GettysGarage]

Thats actually really good fuel economy!

[@gleanerman2195]

I would bet you are getting 8 at best pulling that load. Unless you have a 20 mph tailwind

[@Nathan-kq2ec]

Guess I remembered wrong, but I looked up the picture that I sent to my buddy with a 6.0 GMC gas. It was a 78.8 mile tow, mostly two lane highways, around 8 traffic lights 10.1 mpg. I used to get over 12 with my old 5.3 1/2 ton.

[@steveg5524]

@@Nathan-kq2ec Here in the Anchorage, Alaska area, my old 2006 Silverado 1500 with a Gen III 5.3L engine has consistently got 12.5 MPG in mixed winter driving. Unladen summer driving ranges from 15 to 19 MPG.

[@Podchynok]

I have 2021 GMC 3500 6.6 gas. 68000 km so far no issues, towing occasionally 7-8k pounds you can hardly feel it. No oil consumption issue in mine, I check once a week.

[@sa22see]

I have a regular cab and 4x4 package and I love it. I have 50K on it now and no issues. Off the line on 4Hi and wet surface almost nothing can beat it. Great tracción control.

[@TimO-D]

Great informative video! 7.3 Godzilla next?

[@GettysGarage]

Thank you sir! That is the plan, hoping to get my hands on that engine soon!

[@CortJohnson]

I hadn’t heard about the bad fuel economy. I just saw a video from another car KZbin channel where the person was getting think 15 to 17 or 19 on the highway and was quite pleased with it.

[@GettysGarage]

19 on the highway is pretty good!

[@jaredfletcher1587]

When I worked for Chevy dealership I drove one and was getting about 15 mpg

[@nhlcfl7733]

Thanks for your comments. I’ve had no oil burning with mine and when unloaded my 2500 gets 14-16.5 L/100 km on the highway. I even switched to more aggressive Firestone XT tires with mine. M I think that story is overblown. If interested, read my story and about the Oil Catch Can.

[@Deleteguest]

Mine has about 39k on it right now. I did an oil change at 420 miles, 1500, and then 4000. Since the truck is DI, I bought an oil catch can from a company called J&L Oil Separator Co. The catch can is designed for these trucks. I will say, I change my oil every 3k miles. These engines spit A LOT of oil into the PCV system. Even after just 3k miles, that catch can was damn near topped off. Which is great to see because that just means it's working I guess! I did do ONE 4k mile oil change but that's because I did a long road trip from Minnesota to Arizona and back in like 4 days. So I wasn't too worried about that. Oil was still new. But running my oil that long, I did notice that when I went to change it after like 4200 miles total, that the oil level was only maybe covering 1/4th of the dipstick. The way this truck consumes oil is very inconsistent. In between 3k oil changes, sometimes it doesn't consume a drop of oil, and sometimes it'll eat through maybe half of the dipstick. It's certainly no issue I have to worry about though, because I'm not one of those guys who run 5,000 or 7,500 oil intervals.

[@rag5283]

I really enjoy your unbiased opinion on the equipment you review.. Can you please do a video on the GMC 6.0 liter gas.. When mated to a 2500 or 3500 and the different trans. options they came with. Thank you

[@hoosierwifiguy7001]

I've got a 2022 that I upgraded from a 1999 Jeep XJ so this has been a dream to drive long distances and work out of. I have kept an eye on the oil but don't notice anything bad. Occasionally I have to drive on long trips of 3-5k miles round trip and everything has been great. Fuel consumption is what it is.

[@johnsobel4409]

I have the 2022 3500HD(not the dually), love it love it, no oil issues at at all, love the 6 speed trans, without the truck camper in the box I am getting 16 /17 MPG at 72 mph way better than my 2003 1500HD

[@Bermsmasher80482]

What are you getting with the truck camper?

[@michaelthompson3617]

What do you love about the 6 spd trans?

[@Sergioyfz18]

“Besides the burning oil it’s a reliable truck”. We appreciate your politeness

[@ChristianCotney-v1u]

Give it time. Wouldn’t surprise me to see these trucks on the road running strong 20+ years from now.

[@markalford5406]

My truck burns 2 qts with heavy use in 5k miles. With normal driving not much maybe a qt. I check the oil level every 2k miles now that im up on the oil consumption. I had a 2015 Ford diesel and couldn’t keep it out of the shop. So far with 25 k miles on truck it’s a good truck.

[@marcustellechea]

I have a 2024 6.6 gas with 10 speed Allison currently at 4500 miles and I love it! wastes a lil more gas than my previous 6.0 but the power is amazing for towing! no regrets ! also my 2016 dramamax 3500 with 100 thousand miles is sitting with cp3 pump busted! damaged the whole fuel system ,9000 dollars to fix it ! sticking with gas

[@Joel_E]

You mentioned that GM hadn't put a stroke this long in a modern small block before. That's almost true, but I do believe that the 4"/101.6 mm stroke in the LS7 is actually longer than the 3.9"/98 mm stroke of the L8T.

[@paulmiller4549]

I heard the 10 speed Allison is standard in the 2024 HD with gas engines. That will be a huge factor over the competition in my opinion.

[@GettysGarage]

It will really help this engine in all aspects!

[@tintdr]

The Allison is not what it used to be. It junk these days. Rams Aisin in my opinion is a better transmission for pulling heavy loads

[@matthewcaughey8898]

@@tintdr still better then the 8 speed that we at GM dealers keep at least one on hand at all times

[@georgeedwards5468]

Only issue is the 10 spd isn’t a true Allison and everyone I’ve heard is junk it’s a ford Chevy experiment love child with Allison badge allegedly

[@greatlakespowerstrokefx4]

Same architecture as ford 6.8 and 7.3 use. Its just a weaker version. Same trans as the duramax has had for years but its a gas version so its not as strong as the duramax version. Knowledgeable buyers know its not an allison trans and that isnt a point of superiority anyway. Given the common torque converter failure of the 6l90e of the 6.0 and first couple years of 6.6, gm is better off using the 10 speed ford trans. Valve body failure and the bushing issue appears to be less frequent than the torque converter issue of the 90e

[@C6Z06J]

I have a 2004 2500 HD gas with 330,000 miles. Its been a great truck. A touch down on power maybe. But it always gets the job done. Mpg i can honestly get 14-15 empty. 9-12 towing depending on weight. A tune with HpTuners helps so much on these older trucks. Tweaked lock up and Decel fuel cut off to help get solid mpg gains

[@doc294]

I have this truck. 67k miles. I'm getting 15mpg. Zero issues this far. I love towing with this truck. Now they put the 10 spd Allison (which I'm still salty they ended up putting it in). LOVE this truck!

[@robertbuck1028]

I have a 2021 chevy 3500HD 6.6 gas with 37,000 miles and tow a 10,000lb 5th wheel. I have towed in mountains and deserts and have never had an issue with oil consumption. I do change oil every 5,000 miles. Also, gas mileage towing is 8 mpg and I am getting 16 mpg without towing. I am in the process of ordering a 2024 6.6 gas with the Allison Trans when GM decides to go back into production of long bed trucks. Probably will wait 4 to 6 months. Thanks for info and great job!!

[@robertothmer7137]

Just bought a 2024 with the 10 speed Allison, LT model. I will monitor the oil as was your concern. Only available with 3.73 rears and probably should be offered with 3.56 or 3.23 to increase fuel economy for people like me who don't tow often. Far better than my 1\2 ton GMC with a load of firewood!

[@kc2giw]

Love my L8Ts. I have one in my truck and swapped a modified 6.6 into my 65 GTO. Lest we not forget the holiest of holy LS7 (gen 4) had a 4.00 inch stroke 💡

[@jeffwolf8018]

I love to hear there's no active fuel management on this engine. It was a concern of mine until I hear you break it. Thank you

[@jimmywu12345]

Just bougt a brand new 2024 HD2500 6.6GAS with 10 speed Allision Trans ,LT , I had drove 1000 miles on it, oil life current is 86% left and don't see any noticable oil consumption ;and secondly, I got 16.9 mpg on highway,and around 15 + mpg combi without hauling anything,which I think it is no bad,I guess it 's because of the 10 speed trans. It has a big new latest screen with center console ,it is awsome to me by far!

[@BRoweeman707]

I traded my 2020 ram 2500 6.4 tradesman for 2020 6.6 Chevy Ltz. First thing is I bought ram brand new an changed the oil every 3k till 60k miles when I traded it in on Chevy with same mileage. I had zero issues with the ram. Not one thing broke or one light ever came on of three years of owning. Ran the truck hard every day. Traded it cause of comfort of the Chevy an quality of the truck rams metal was weak lots of dings an dents from wood off road etc. so far I’ve had the Chevy 5k miles an it burns oil a quart every 1200 miles or so. Which is bout every 2 weeks for me. I haven’t ran the truck hard or towed with it one time. Few loads of firewood that’s about it. Also recently it didn’t start 3 times in a row I started to worry as I was 4 hours from home on a fishing trip when I hit the remote start it fired right up. So maybe it’s my luck for trading a reliable truck for a lemon but I will say the Chevy drives a lot better tighter then the Ram it does get better gas mileage I’ve gotten 19mpg Highway 14 city. The 6 speed transmission suites me better then the 8 speed ram which was constantly shifting in the mountains I live in. The Chevy transmission runs hotter I have noticed 180 to 190 where the ram roped out highest temp I’ve seen was 181 towing heavy loads. Ram was fast as well would mop the 6.6 im not unhappy with the trade just figured I’d share my experience. Hope it helps

[@richardjohnson6053]

Great job with a broad analysis. I have been a huge diesel fan but with the emissions and high cost I opted for a gasser. I can't see the $100k price tag, I bought a used 2021 gmc 3500 srw. I looked at all 3 brands, decided on gm. I was really impressed on the pulling power for a gas engine. Ram fell face down, and ford had more get up and go but worse fuel mileage, and major break downs drove me away. So far in 25k miles no oil consumption, and unless I am climbing with loads it's decent on fuel mileage, . Pulling 20k-32k goosneck is my average weights pulling. Really don't drive empty. But 11.2 mpg loaded is average. Not too bad. Really luvin the torque this engine puts out. Don't pull over 70 mph. Cruise control set when on highway.

[@sheldondurant3627]

After all that's been said. I feel the 6.0 is better. I've had no problems with my 2015 Silverado hd. I tow with it often and no oil consumption. My only complaint is the shift pattern, not set for a 410.

[@keith75460]

I have a 2017 6.0 and the truck is bulletproof. The fuel mileage is not great but it pulls well and has been totally reliable. I know several folks with the new 6.6 gas engine and none have had issues or oil consumption. The 6.6 seems to be as reliable a power plant as the 6.0.

[@seanmurphy8687]

We have a bunch of those trucks in my company's rental fleet. I can say I'm always adding oil when inspecting after returned. They do run good and move those trucks nicely in my opinion.

[@bannedbycommieyoutube5time920]

Good data point since you have/maintain a fleet of them - thanks

[@sledfam3659]

I have had my 2020 6.6L since September 2019 70,000+ miles. Love it. NO oil burning issues…… I pull a 11000lb 5th Wheel and a 6000lb snowmobile trailer. Pulls awesome… I have had GM trucks 2011, 13, 18 and now 2020 All were great. This 6.6L has very noticeable HP and torque gains… ZERO measurable oil loss. As for gas consumption when towing exactly the same as past. Non towing is slightly better on gas mileage. Love GM trucks. I am a Master ASE tech and a Master Chevy tech. Only thing I have had with the 2020 was the main starter cable nut was slightly loose and gave me a intermittent slow crank. Chevrolet’s the only way…… Ok maybe one of the 4 was a GMC.😀😀😀

[@michaelthompson3617]

I found a 2022 2500 6.6L LT 6 Spd, I'm loving the price and I think this will be a first great truck for me. I want a 8 or 10 spd trans but the price is great with low miles. It's nice to read your words about Chevy. I wanted a Ford but a F-250 is a bit expensive. I spoke with a diesel mechanic from Ford who mentioned their just not necessary. Thought?

[@udflyer98]

I don't have any oil consumption issues with my 2022 2500HD LTZ. Just rolled over 36k miles and killed the warranty yesterday. I traded a 2013 LML Duramax for this truck. The overall fuel mileage isn't much different than I got with the diesel in both daily driving and towing. Flat ground unloaded I can get 20 mpg. Towing a 10k trailer drops it down around 10 mpg. A headwind definitely affects fuel mileage since it has the aerodynamics of a brick.

[@jacobsebastien3910]

Lie's

[@willmeredith8765]

I guess I was the one to draw the short straw this time. I own (and love) a 22 2500 Z71 long bed crew cab with the L8T 6.6 Gas... barely got 7k miles on it, because first I was working away from home for almost a year, then I took it to the new gig in Houston, and they stole it! I got it back mostly unmolested five days later, BUT... they ripped the onstar computer out, damaging the fiber optic cable I fix Fiber Optic Cables in Boeing Aircraft, and could have repaired it in 15 minutes, But GM said that would void the warranty... they finally, 11 months and 19 days later, put a new fiber optic cable in it, and I should be getting it back next week.... just over a year waiting for a part! I have owned Chevy Trucks from a 63 to this 22, but I fully expect this to be my last! GM doesn't care, either!

[@Sadlor82]

Im form Poland and im a great enthusiast of American Automotive indusrty, i love to listen about V8 engines and features they have. That oil consumption is now a major concern everywhere, European fnacy cars also have use oil issues problem, and the major reason of that is they have a lot more thin piston rings than cars form for example 90s. They use lot more thin oil 0W20, and they have delicate thin piston rings and that is the reason of major oil consumption. I remember a Skoda S100 from the 60 we had and that engine had a normal useage of oil at 1L/1000km, but it was a car from the 60s and technology was a lot more primitive then now.

[@DeanNordseth]

Welcome to the USA!!

[@johnthompson4863]

This is a very good truck I a 2021 2500 I have a 6.6 gas engine I have 70.000 miles on it all I have been on the truck is charging the oil and my truck is white and black and I have a 30 foot trailer the truck is doing very good all the time ❤my truck is all payed for with know payment it was all paid for in 2022 years ❤❤

[@Transphoenixbiker]

Ya I work at a fleet shop where I mainly deal with the 6.6. She consumes oil where if there’s oil on the stick I’m actually shocked. But the abuse they get, man did Chevy build a tough motor.

[@dkminkus]

I love my 22 6.6 gasser, it does consume some oil every now and then but I also get around 15 mpg average on back roads to and from work

[@westcoastronnieOC714]

I'm glad you did this review. I was thinking about this engine but I'm glad you gave an honest review now I'm going to wait a few years before I purchase a 6.6 l gas engine. Quart of oil every 1,000 MI uh! No! They should get rid of their engineers there and hire people who build motors for a living and they would probably build a lot better engine then these suit-and-tie guys that sit at a computer all day. We need real world people who work with this stuff working for GM.

[@mwsr2521]

I have a 2021 that I use for work in the middle east, and no oil consumption issues, AC needed recharged a couple times but thats the only complain, all in all i like it

[@Mikemartin968]

I've got the same truck, 2020 model work truck just turned 16k miles. No oil consumption (so that's good news!) and I'm seeing 14.5 MPG unloaded and about 9MPG with a 12k 5th wheel. Pretty happy so far, but my transmission is starting to clunk - so looking into that now.

[@cnbsdad]

Your videos are awesome. Any upcoming videos on which gas 3/4 ton is your number one pick ?

[@brettjohnson1393]

I have a 2023. Mine gets reasonable fuel mileage for what it is. 17mpg highway, ~13 in town, ~8 towing 11k lbs in the mountains. Considering the guys I know using the duramax are getting 18-19 mpg highway, and about 11 towing…with the price difference in diesel and gasoline, it’s a wash. No fuel savings in the diesel. My old Cummins was great, even towing, but these news ones really aren’t. The comfort and ease of the towing experience is awesome in the duramax, but diesel isn’t the way to go anymore if you’re looking for cost/efficiency. It’s purely pay to play. If you need a diesel for towing capacity, use it to tow frequently or for work, or if you just want a bad ass diesel truck-those are the reasons to get one. Need to go check my oil though, lol

[@MrChadx1]

Once you check your oil, please report back. Very few trucks seem to have the the oil burn issue, so will be curious on yours. Please share an update. Thanks.

[@jimingvaldson7076]

My numbers on the Hwy and towing are very similiar to yours. I live 1 mile from town and the short trips into town with a stop light and a couple stop signs my mileage is awful on that. Around 5mpg. I had been wondering what guys were getting with the duramax pulling. 11mpg? With how much more expensive diesel is and another 10k to purchase one I will stay with the gas. Looking forward to the 10 speed in the gas though.

[@brucelee2554]

@@MrChadx1 I’m not having the oil issue with mine. At the end of the day though if you’re on the fence about getting one, consider the reliability and ease of being able to work on the 6.6 sometimes downtime is way more expensive than the repair when you own a business and are loosing money or upsetting clients. A few tools a trip to auto parts store and you’re back on the road making money.

[@MrChadx1]

@@brucelee2554 Agreed. For my use in an HD (overlanding pickup camper plus towing small trailers less than 5,000lb), I'm not even considering diesel.

[@GettysGarage]

owning a Diesel these days is a pure luxury item. It no longer makes sense to own over a gas engine in terms of cost.

[@riccochet704]

Good to know about the oil consumption. I didn't know that. The other issue with burning oil is a lower catalytic converter life.

[@JamesCalabro-od9ci]

I have a 2022 chevy 2500hd 6.6 gas.. before my 15,000 mile oil change my change engine oil soon light came on.. I checked the oil and there wasn't a drop on my dipstic.. brought it to the dealership and they added 2 quarts to bring it to full level.. at 19,800 miles the change engine oil soon again came on and the engine was low again on oil roughly 2 quarts.. now I'm bring the truck in to the dealership every 2,000 miles to check consumption.. Friday they checked it and added oil without telling me and showing me the dipstic and said it was at 3,300 down .6 of a quart.. again they didn't show me the dipstic and added oil to my truck behind my back so im freaking pissed the fuc off... I absolutely love the truck it's regular cab 8 foot bed LT the most loaded you can get for a regular cab it was a special order it took 5 months to get.. I have 5 year bumper to bumper good till 10/2027 and a life time warranty on the engine so my fingers are crossed with this ordeal hopefully it gets sorted out.. ✌️

[@carsonpoppenger3189]

Great detail in this video, appreciate the insights on the oil consumption.

[@timrobertson2511]

I was going to pull the trigger on one of these this weekend but that oil consumption issue mentioned in this video made me gun shy. I fought that battle in the past and have absolutely no desire to go through that BS again.

[@tonytigere5684]

Great video. Can you make a video of the big 3 on their common issues and their price of repair if not on warranty. I have a 2020 tradesman power wagon that just been problematic. Currently it doesn’t change into gear. Luckily it’s under warranty but honestly I want to trade it in. I also have a 2015 Jeep Grand Cherokee that I’ve spent 7k u.s. dollars in a year and a half. Looking at selling it real soon. Every issue with the Jeep was $1300 or more. Nothing was a cheap fix on it. So a vid on the 2500 gas on the 3 would be great. Don’t care about towing. I just want a truck that’s last and if one thing is a common issue , that it won’t cost me my arm and leg like the Jeep did.

[@jimlorreendrockner2492]

I have a2020 with 89000 k no oil consumption issues 12.5 to 13.5 L per 100k . We tow a holiday trailer with a rzr on a truck deck and likes it fuel tow in the mountains . I feel the power is pretty good for a gas engine I feel it is a very good engine and no issues . My back ground is iam a licensed automotive mechanic with over 40yrs in the business most of that time at gm dealerships

[@jonbrowning6839]

I have a 2022 GMC 2500HD no noticeable oil consumption, but I installed a catch can when new and it accumulates about an ounce of oil every 500 miles or so. That is after letting the water settle out.

[@Phpegrum]

Owned this truck for about 2500 miles now. I’ve added three qts of oil, I do tow a 7500lb trailer often. Frustrating. Is there a fix first this other than replacing piston rings? Great video.

[@TheRoeshow0324]

I put in a PCV reroute to a catch can for my 2021. Trying to keep the DI as clean as possible to avoid build up

[@brucecollins8865]

I own a 2022 L8T crew cab LTZ with 35k miles on it. Recently did a 1200 mile round trip Iowa-Arkansas and returned 16.7mpg at 75-77mph for the trip. Mine used less than 1/2 quart in 5k miles before I changed the oil. Non-issue for me.

[@dans4900]

Got a 23 3500 and get the same mpg as my 14 2500 cargo van with the 4.8 v-8 @ 6900#s. So to me the 6.6 is pretty efficient on gas at 14.5 mpg

[@claydand2420]

I understand the feeling/judgements/comparisons on the big 3 engines. While you are buying a certain power train, the rest of the truck comes with that. Even if this 6.6 is the pooch of the 3, it's proven that the whole of the vehicle will outlast the other 2 substantial. Really would like to see Toyota dive into HD trucks.

[@GhostFishSlayer]

I, too, wish Toyota would add a HD. The thing he forgets to mention is the 7.3 has some major top end problems, and I don’t trust the 10 speed transmissions on all of the Big 3 except for the Allison.

[@h8troodoh]

Toyota owns Hino so that could be a reality one day..

[@georgeedwards5468]

Yup the dodges are junk in front ends in my opinion fords have lots issues also if you need more power than 401 hp or 464 torque buy a duramax or cummins

[@ronladuke7235]

Almost all modern manufacturers have had Issues with using oil. Often to do with the low tension piston rings. Ford coyote engine a couple years ago! I would bet they have that sorted by the time you are talking about it?

[@spencerh1813]

What about burning oil affecting catalytic converters? I know on older converters oil burning could result in filter backup issue. Love the videos man. Home mechanic here myself. Used to be a marine diesel mechanic.

[@steveg5524]

Oil burning GM engines (with bad rings) have tended to destroy the cat converters over time. Had to replace one at 120K miles in a 1 quart burning GM 4-cyl 2.5L engine. Oil burning GM engines are a concern!

[@beef9c1]

I drive the same truck but with a utility bed. My boss bought it for me to use for work. It does has the same big motor in it, along with the towing gears. But I do have two problems with this truck. First, it gets between 10-12 MPG. I rarely get 14MPG. I alway fill it up with gasoline when the fuel gauge get half way. Second is the hood is not easily to grab to close with. It is way up there, I have to grab a small block or step ladder just to close the hood. Other then than, no problems with yet.

[@richdv6800]

Thanks great review. Between this one and the Ford 6.8L V8 Gas, which one would you go with? Thanks!

[@jerrystoops1142]

My 2020 has no issues and is a beast compared to the 6.0 I had before and the 6.6 gets better fuel mileage running around and towing-same gear ratio.

[@BetaRacer24]

The 6.0 had a 4.10

[@shaunquinlan8953]

I'm surprised they haven't found a way to get better MPG. My 2001 4x4 Silverado with the 8.1L gets 12mpg all day long. Doesn't use quite as much oil either. Guess Ill just keep driving it.

[@michaellecount8510]

Bought my 2500 HD new last year, just hit 13 k miles, 15.3 mpg. I just changed oil , measured what I drained out ,level was down 1 pint, thats with 3600 miles on that oil. Pretty normal I would say.