I Test The Fuel Economy Of The Chevrolet Silverado 2500 6.6L Duramax Because The EPA Won't Tell You!

Zach is taking the Chevy 2500 3/4 ton truck on our MPG loop to see just how it does for highway driving efficiency. We realize folks use their trucks as daily drivers and it's great to have a baseline expected highway efficiency figure to plan fuel budgets, so that's what we provide with this test! Let's see how well the 6.6 Duramax V8 sips fuel in our 70-mph highway fuel economy test.
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#Chevrolet #Silverado #Duramax

[@eddstarr2185]

Very impressive fuel mileage from the Duramax in an unburdened Silverado 2500HD. Quiet and well appointed for such a beast of a truck. Thank you, Zach, for a cool video!

[@bull5919]

that's not impressive at all he was on flat land a lot

[@robertsample1430]

My 1999 dodge 3500 4x4 with 306,000 miles gets 25.5 on hwy chipped 300 horse 600 ft torque. Bought new in 99 always got these milage numbers. Still going strong.

[@adamshaw8214]

600 torque🤣🤣

[@Matsterious]

Great job with the video!

[@simonthebroken9691]

Thanks for the content.

[@JetTech1966]

I have a 2022 2500 custom model gasser. Although I do have diesel envy, I'm so glad I didn't buy one. I go 10 miles to work, top speed 40mph with I've lost count on how many stop lights, 14.5mpg every time. 17 to 20mpg on the highway with the cruise set on 70mph. 8.5 to 10mpg towing our 9k lb. camper with the cruise set on 65mph. No I don't have 900plus lb/ft. of torque. But I've never needed more then the gasser has to offer. If I was towing anything over 14k lbs I would definitely get the diesel for it's torque. But anything less I feel is a waste. Gas is 2 bucks cheaper, no DEF fluid, lower maintenance costs, lighter with a higher payload. Diesel costs 10k more right out of the gate. When you run those numbers, it only makes sense if you're using it to do pulling almost everyday to try and recoup the upfront costs. We will see how the 6.6L gas does longevity wise over time, but with an iron block, forged crank and rods. It should stand up to the test to time for almost everyone. Oh and I love the 6L90E transmission, smooth as silk and never runs above 185' when towing our camper in 95' weather. To each their own, I have diesel envy because of the torque, but in all honesty, is it really needed these days for most?

[@coltonhaneghan7806]

My 2016 chev 2500 6spd alli gets 20 to 25 how I drive..but, I don't have that emissions crap,def crap. 4in exhaust, super super super clean tune no smoke at all winter/ summer towing, stomping on it.

[@InternetDude]

I don't care what your name is, I'm going to call you Mr. Beard. LOL

[@andrewthomason3857]

It’s really Kyle in a Paul Bunyan costume.

[@pauldenino5644]

THAT'S MR. D0UCHEBEARD TO YOU SON

[@RTOutdoors]

I have the same truck/powertrain. Once the engine starts to break in, fuel economy will improve. I routinely get 21-23mpg on the freeway. Around town, 16mpg is about average. Pulling our trailer (just under 11,000lb) I can average around 10mpg.

[@ifonlyone5645]

Same that I have seen they are impressive

[@adamshaw8214]

Mine gets 10mpg pulling a 3000 pound trailer. It also feels slow as hell. Must be something wrong with mine

[@357fligga]

At what mileage would you say your engine was broken in?

[@RTOutdoors]

@@357fligga starting to see the economy improve at around 5,000mi

[@rahulrane1658]

That is impressive MPG. You must have done everything by the book and maintained the truck in top notch condition.

[@InternetDude]

14:45 you're welcome

[@alexnutcasio936]

18.2 total mpg on your 58 mile loop is not bad for such a big horse of a vehicle that’ll also tow 20k plus pounds…..15:05 By the way, more Zach, less Kyle would be nice.

[@dr.jasonanderson7226]

The best I have is 30.8, I can average 24 fairly easily

[@rajanrairealty8979]

bs.computer

[@shanebrown2963]

Is that with the 3.0 liter duramax in the 1500? I’ve never seen the big duramax get those numbers.

[@barryw9473]

Why not tow in the rain or snow? That is the real world, no? In CA diesel is close to $7.00 a gallon , you should feel lucky.

[@ondago2]

I get 18 to 18.8 mpg at 70 mph from My 2007.5 LMM DURAMAX Crew 2500HD (so same truck config). Locker is it's ruining 35"x12.50"x20" Mud Terrain tires. Oh and it's got 365, 000 miles on it. Only a 6spd Allison 1000. I'm always thinking I'm supposed to get better mpg but I get what he got here driven the same way and I do the division of GPS or ODO miles driven on Pumped gallons many dozens of times (I tire 30,000 miles a year with it). Not it's not sure accelerating at all and tows > 13k up the Appalachians like it ain't even back there. I guess she's still performing pretty well.

[@isx530gary]

Take a look at the specifications on the Volvo trucks or even all the new semi trucks in high gear. They’re almost idling the engines 1100 RPMs versus years ago returned 2100 RPMs, all the time the difference in fuel economy and how long the engine last.

[@michaelcopeland8985]

I have 2020, and without pulling I average 23-26 mpg.

[@adamshaw8214]

Bullshit

[@michaelcopeland8985]

@@adamshaw8214 let's go for a drive

[@thebouchers9269]

Is that the 10 speed transmission?

[@EvanBtechman]

I bet the mpg wouldve been better if he gone 60-65 mph. I read that the best fuel economy comes from driving anywhere from 55-65mph. I'd love to see a test doing that.

[@billylee2312]

Mine gets around 23 running 60. Just not many places you can run 60 and not get pulled over by a cop

[@jadesumsion]

I had a trailer come off. Actually the welds broke. I always want to see the ball.

[@Drblunt951]

2022 gas 6.6 lifted …8-10 mpg 😆🤷‍♂️gonna convert it to e85 since Chevy only makes e85 in the “work” trim

[@MrMastablasta117]

Lol your milage will go down even about 20% with e85

[@twocooleetoh3128]

How high is it lifted? Wheel and tire size if you don’t mind.

[@techs1smh13]

03 Federal emissions lb7 smog legal in CA no cat or EGR. CC lb banks big hoss bundle 6 gun 4" exhaust ,intake bla bla 35" BFG will pull 21 mpg. Level 3 cruise at 78 to Vegas from so cal. 5 bodies and loaded bed for mint 400. It's a keeper

[@cfrank925]

Diesel is $6.71 per gallon here in Sacramento, CA as of 6/6/2022

[@techs1smh13]

Just saw 7.07 in so cal. Let's go Brandon

[@twocooleetoh3128]

And the gov get to keeps his job and smile all the way to the bank

[@johneric98]

What is the mileage with a cover on the back?

[@AH-bm4ts]

I'm thinking with a cover or cap and some hypermiling technique low 20s

[@patrickio8084]

Anyone here have a 2500HD gas or diesel with a hard top camper (not a pop up) with avg MPG figures?

[@isx530gary]

A question I don’t think it was discussed. I missed it if you did. What gear ratio were you using? I know on Ford the F250 equivalent of this. Do you have a choice of 3.31 axle 3.73 and 4.10 all of these focus on whether you’re going to pull all the time or run around town with obviously the 3.31 axle ratio will get better fuel economy because the engine turns less, I would appreciate it. If you could add these numbers into your equation, give more insight into the vehicle. What it’s designed for obviously they’re all for towing but some are for lighter towing another’s and fuel economy. Does change the different axle ratios. Also, you can get into it final drive ratio of transmission axle ratio and revolutions per mile all these come in to play. I think it’s a very fair comparison if we know axle ratio to axle ratio between the different brands. Also, this is something else missed most of the interviews and tests. I’ve watched as someone who has bought and run commercial trucks axle ratios are everything. I.e. a truck hauling air freight semi runs light all the time versus a heavy haul truck. Both trucks are denticle, except one will have heavier frames and heavier springs higher gear ratios, numerically.

[@jamesglavich1426]

I guess only GM can answer why, but the only ratio with the 10 speed Allison/Duramax is 3.42. I would like to see an option too. I think that going back to the 3.73, like the 6 speed Allison/Duramax would be a good choice, but they take away that choice.

[@isx530gary]

@@jamesglavich1426 yes you also need to take in consideration the overdrive ratio of the truck 10 speed. Also the lowest gear ratio. I’ll reference so Mack trucks they would use a .62 overdrive run 4.88 final drive your ratio. This is the formula tire revolutions per mile times transmission overdrive ratio times final drive ratio this would give you the engine speed at 60 miles an hour. There’s also another formula involved which I cannot remember that calculates. Great ability. Which is the tire revs per mile transmissions lowest your times final driver showtimes another math number that I cannot remember to complete the calculation. From what I know what I could be all wet hair, but when I was buying and ordering my own trucks, the rule of thumb was your gear the vehicle to start it’s rated load on his 14% grade for the engine idling.

[@johninnz]

$5 per gallon is bloody cheap!!! We're getting screwed here in New Zealand, currently paying $6.20 USD per gallon

[@scottbreseke716]

You've picked a gas-expensive weekend to do the test.

[@dalelieber2697]

22-26 miles per gallon to Aurora and back

[@amgguy4319]

I might be mistaken, but I think GM Trucks are the only vehicles GM doesn't actually design to Kill you. Sure, they might have Disintegrating Wheels, Peeling Paint, Faulty Lifters, etc., but by getting a diesel truck from GM, it might actually be the one.

[@TheKingOfInappropriateComments]

What would be more valuable is real world MPG. Stop and go at every red light not going on a flat straight road with cruise control set to 70.

[@sputty08]

Colorado. Summer time no load, 100% city traffic..13mpg. Winter time, 11.5.

[@Ahmad-yw5hl]

Please don’t do the 30 seconds method. You are going to hurt the truck eventually. Even in the manual it says that. Thank you so much for this beautiful review.

[@rajanrairealty8979]

only 2 mpg better but double price nm diff frm my megacab

[@aliendroneservices6621]

2:55 That's a terrible size and location for an emergency button. *EDIT:* Tundra emergency button is in the same location, but is wider, and is distinguished by a red stripe just below.

[@yankabilly1963]

Put a hitch on it and you won’t be able to that tailgate step

[@jamesglavich1426]

B&W TOW AND STOW

[@edysinsimon8646]

Not too bad fuel milage wise.

[@aliendroneservices6621]

Zach, look up "Croissant Diet specification". Helpful tips there.

[@robertdragoff6909]

So this vehicle is an economy car…. Actually 18 mpg is good in a truck this size. I wonder what mileage would be with a trailer hitched to it. Maybe you could try the hybrid version (if there is one) and compare it to this pickup. Interesting video

[@-Jethro-]

My 2009 Duramax with the six speed Allison gets 19 hwy unloaded and 12 hwy pulling a 7000 lb travel trailer. This is at 60-65 mph. Around town, uh… don’t ask.

[@robertdragoff6909]

@@-Jethro- no problem, understood

[@alexnutcasio936]

They don’t make a hybrid diesel, so what’s your point?

[@robertdragoff6909]

@@alexnutcasio936 Why not make a Diesel electric car similar to what they made for submarines before nukes?

[@alexnutcasio936]

@@robertdragoff6909 I’m in. Do it!!!

[@Kimbrough87]

I would rather have the rivien

[@shamwow7996]

I get 16-18 with my gas

[@twrobertsphotos]

EA charging station 200300-02 has been out of service for over a month. Can you reach out to your EA friend to resolve this issue for my community. Today there were 4 Ioniq 5’s waiting to use the remaining charging station.

[@fabianpachoek7731]

where fluing def

[@SamuraiTacos1]

lol 12 mpg

[@Colton-zp4ng]

Hey your waisting your time TFL already done that

[@MSDOGS1976]

You just can't beat a good gas guzzler. Screw those tiny EV's.