2 years later a quick update on the Cummins X15

[@jeraldhylton1237]

Steve- (Greatest Salesman ever)... Purchased mine about 6 months ago from you, zero issues. My local Cummins dealer is providing routine maintenance/service, and with the exception of a little fuel mileage loss after the first software update, I am completely satisfied. Pulling flats in the mountains of Kentucky and West Virginia, our’s gets a real work out, but with the 2050 torque we handle the grades with stride, while delivering a solid 6 MPG. Yeah, we sacrifice a little mileage running a big hood 389, but looks and appearance are quite important to us, as our family has always had long hoods since the 90’s. Such praise coming from a Caterpillar lifer, should speak volumes. Keep up the good work!

[@SteveCarbone]

Thanks Jerald! Glad to hear the good review.Wishing you and your family a very Marry Christmas. Call me if I can ever help you with anything, see you on the next one!

[@relaxationstation7374]

2050 torque has it's advantages but it will grind your rears all to pieces if you get stuck somewhere and start spinning your wheels to try to regain traction and free yourself... So a lot of, especially heavy haul, operations turn their 2050s back to about 1900 for driveline component safety.

[@koolshoe6254]

@@relaxationstation7374 Man stop it!!!! 2050 torque you just got to know how to handle that truck. You don't cut the truck back you just learn how to handle it. S M H !

[@relaxationstation7374]

😍I bought an extremely well maintained 2013 Freightliner fleet truck that has a 450 hp Cummins ISX under the hood and I initially had about a $45,000.00 maintenance nightmare with that engine until I took it to The Cummins Gold Store in Sioux Falls, South Dakota and had it worked on properly and had The DPF Filter and DOC Cannister replaced on it at about 650,000 miles, since then this baby has run like an absolute beast and I have had absolutely zero engine related problems all of the way up to my present 850,500+ miles and still hammering at 1,600 rpms all day long!😍

[@I_like_turtles_67]

Big problem with the fleet trucks is you never know how many different drivers drove it. Is it a econ motor by chance? Seems like the economy motors have had more issues than the performance series ones.

[@Robert-oe7uh]

@@I_like_turtles_67 You also have mechanics that will deliberately not fix the DEF system because they know it's a cash cow. It's not super complicated and definitely shouldn't cost 45k, wtf

[@colinpophal8630]

Carbon packed, polished liners, oil consumption, unfortunately that series engine and all other brands suffer from emissions. We are progressing,

[@davidb1089]

I’ll tell you what. Don’t extend maintenance and run synthetic oil.

[@rearspeaker6364]

@@davidb1089 do it 20% earlier, lots of headaches will disappear.

[@leemajors6702]

I have had my x15 605 hp 2050 torque for 2 years now and the only problem I've had was the egr coolant went out at 80,000 miles. Truck now has 330,000 miles on it now and still all good 👍

[@oscarolivas5317]

Bull shit

[@calebniederhofer6529]

@@Ultimatetrucking It is a semi and used for commercial work. 300k is not our of the ordinary. Are you aware of that?

[@Ultimatetrucking]

@@calebniederhofer6529 yes i know but 330k miles in 2years is cool

[@calebniederhofer6529]

@@Ultimatetrucking For sure buddy.

[@calebniederhofer6529]

@@oscarolivas5317 ?

[@janinegia]

I was at the press introduction. I was greatly impressed by the intelligent improvements to reduce fuel consumption, and with the engine's responsiveness.

[@ltslogging3776]

I have a 2018 567 that I haul logs up in Canada with. I run a 7 axle configuration. I gross out at around 140000 lbs. I have the x15 565 with 2050 torque. I love this motor. It has around 4500 hours on it now without a single trip to the dealership for warranty work. I am very happy with the fuel mileage I get from it as well. I haul heavy all the time and it is way better than my old truck that had a C15 cat. I also have a 2000 KW with an N14 in it. The trucks work side by side every day. 👍🏻

[@rd5991]

Agreed man I have the 525/1850 setup with 3.55 gears on my 2018 w900 and it out pulls everything on a steep grade. Also NO ISSUES.

[@jking4020]

Please tell me you are not a Cummins rep that is just making it sound good. I'm also a heavy hauler and just getting a new truck with the x-15. I need to know how good it is for real

[@ltslogging3776]

@@jking4020 not a Cummins rep. So my truck now has almost 9000 hours on the motor. In the last year it’s finally had to have some warranty work done. I’ve had to change an egr cooler and they just did a recall on the exhaust manifold. So far it’s all been warranty. Keep in mind my motor is the x15 performance series. I know people that have the economy x15 and they have had nothing but problems. I do know of people that have had problems with the camshaft but both guys ran the sinblend 10w30 oil. I’ve always run 15w40 in mine

[@RohanSanjith]

@@ltslogging3776 Any update now? how many miles you change oil and which brand you use? x15 has better pull than detroit diesel engines and paccar mx15 engines.

[@ltslogging3776]

@@RohanSanjith so I replaced the truck just after the last comment. I was going to keep it but things changed in my industry so I traded it off on the new one. The new truck is a 2022 389 with the x15 again. 565 2050. The new one will put pull any of the other trucks I haul with. I thought the last motor was good but so far this one is better. I have just under 3000 hours on it now. I change oil at 500 hours. I use a local coop oil that’s made here in Canada. I just use 15w40

[@marvveenstra1707]

It's been another 2 years. Maybe you could do another update!

[@paulbracewell4915]

Yeah for real. I’ve seen many needing rebuilds at 4-500k, tons of emissions issues,cam issues and so on. Just like every other emissions motor . They’re junk

[@angrysocialjusticewarrior]

@@paulbracewell4915 I wonder why they don't just make hybrid engines and cut out all the emissions nonsense. Making a smaller emissions-free engine being supported by a simple large battery should be significantly more reliable than making a normal engine and suffocating it with all these fragile emissions toys. Is hybrid tech really not viable?

[@foreveronroad7409]

Lmao

[@mrsandman4625]

Appreciate the update Steve. That’s good to hear. X-15 is going to be the one!

[@JoeHartmanOFC]

I was one of the first Carhauler to have it.. regional runs daily.. almost 190k and only one issue that downed me 5 days for a turbo sensor.. nobody had it in stock! Other than that.. very nice engine

[@SteveCarbone]

Thank you for the input, it is very appreciated

[@AndrewBrowner]

sounds like cummins should invest in their parts network and advertise/guarantee a specific parts availability.. if you couldnt get something for 5days in 2019/2020 i have to imagine thats 5 weeks in 2021/2022.. but everyone always says how its the downtime that costs you not the repair.. so why not advertise that everypart for the engine is within 24 hours of anywhere in the continental US is that really such a hard ask.. surely a 24hour delivery radius is pretty large team up with amazon or one of the delivery companies like UPS or fedex and have them stock and deliver the parts for them

[@JoeHartmanOFC]

I have a friend that has a truck in peterbilt for over 6 weeks with DEF sensor problems!

[@peterfong2241]

The N14 select plus is my favorite all the way, watching from Jamaica west Indies !!

[@MichaelTJD60]

I'm more of a CAT guy, but it's nice to see Cummins has finally figured out all the issues they've had in past years with the ISX and are now building a much better engine from the "ashes". I don't think the pre-emissions ISX (CM870) engines were too bad, either...like you said in the video, Steve, '08-'12 had most of the problems.

[@hudsondonnell444]

Yes, the EGR pipe on an emissions ISX is the downfall of the engine.

[@scotthart586]

I've got a 13 isx15 and its been one problem after another since i bought it

[@kenworthklass4657]

Running my second x15 performance series and have had zero issues with anything...granted only have 60k on the second one..but love the engine. I run the same fuel filter setup on my 19 w900 and didn't change it till 28k miles and wasn't having issues just figured it was time. They have the emissions crap figured out pretty good now. Would recommend this engine to anyone over a paccar for resale purposes and not being under paccars control if something does go wrong...have a great day everyone and just my opinion

[@SteveCarbone]

Thank you sir!

[@victorbernier4765]

I admit paccar is a good engine but it is a pain that if it has problems u have to go to a dealer.

[@macho1657]

The problem is not the engine is the DPF system......

[@garry3013]

I have the 3rd Gen X15 w/2050 torque. In my opinion the N14 was their old reliable. This engine is a very close runner up to it. 250,000 with not one issue with the engine at all. Only issues i experienced was with the $10,000 TCM Wiring Harness to the Allison 6 spd AT. The truck still being under Warranty. That issue was taken care of at a very minimal cost to me. Not a sneeze or a cough of any kind since. Its in a 2018 International HX620 cab with a Galbreath Right Hook Roll Off work unit installed to the 290 inch chassis.

[@edgardomatos7742]

Had N14 yrs ago , back in 99, 2000, ran great ...small issues , but wear n tare i guess , starter , plastic injectors , leaked. Replace kept riding .. Sold it after 912 So today im thinking of getting back in the game ... Seen 2018 , international. With this X15. Has 437 000 on the clock . What should i be looking for .or ask the salesman Thanks in advance

[@rodleithner7931]

Wow I had an 2000 N14 red top that was one tough motor. Sold it with 965000mi and the friend who purchased it put another 480000 mi on it and overhauled it the tech said he thought he could have put 300000 more mi. So the x15 has had big shoes to fill.

[@100pyatt]

Davco is the ONLY way to go...👍 The Paccar filter is total junk. Also as you stated, the bigger CFM Air Compressor option is a must have. Why it's not standard is idiotic i think.

[@rearspeaker6364]

they have no optional air compressors for the ISX or the X15.

[@demetresrobinson2694]

I purchased a 579 from Steve with the x15 in it. Hands down I love this engine, I do have the paccar fuel filter and I have experience the filter clogging issue. It seems to be bad during the winter months, I went with a different micron filter still within Cummins specs and that solved the issue for me.

[@DIYDime]

Can you share part number of filter?

[@FirstKickProduction]

What filter are you running?

[@LifeisGood2018]

Tom with Cummins claims they have tracked the fuel filter issues down to a refinery in Pennsylvania, and that refinery services a big area, I’m just going by what the head developer told me, I know I haven’t been east in a while and haven’t had fuel filter issues since I hit 100k miles now I’m at 174k and running strong and trouble free. Great video 👍 the X-15 Cummins engine is a beast!

[@3406eJB]

indeed it is

[@johnnichols6267]

i have a 19 w900 with x15 .. 565 ..my fuel filter gage almost goes up as fast as my rpms do.. turbo boost doesn't go over 30 psi can anyone help. going down get on ramp it gets up to 5 with almost new filter. crusing at 70 its around 3. let off and cost it goes down to 1.. last week it was up on 15 with 3000 miles on filter

[@LifeisGood2018]

John w Nichols find a better fuel supply and turbo will never go over 30 that’s its max, doesn’t need anymore, but check for animal fat in your filters and don’t buy fuel from loves

[@johnnichols6267]

@@LifeisGood2018 thanks

[@kenworthklass4657]

That sounds like a fuel issue to me. I'd try getting fuel from different truck stops to see if anything changes. Good luck and stay safe

[@Freyes2017]

That's going to be my next engine, for now I'll keep my kenworth t600 N14 500hp, no issues so far.

[@aztxtransport2776]

Freyes 2017 Got 2005 isx. No problem at all but air system is killing me. Always water in it, valves breaking down one after another.

[@ihtiyorochilov4815]

N 14 is the best one... This all new engines are junk.

[@chrisbelsito4231]

N14 red top??? Best motor I’ve ever had!!!! Keep it keep it keep it

[@jansen7640]

@@ihtiyorochilov4815 it's getting better. Oh wait... www.cummins.com/news/2020/06/05/op-ed-we-must-speak-and-act-end-racial-inequality

[@ron8742]

@@ihtiyorochilov4815 why u say that..don’t just oppose and not elaborate, your just spreading confusion

[@LamborghiniV12M]

I want this engine in my Motorhome... currently have an ISX CM871 600hp, with EGR and DPF delete.... runs amazing.

[@SteveCarbone]

Im jealous sittin over here at 400hp with a baby Cummins in my coach....

[@LamborghiniV12M]

Peterbilt Steve my coach came with a Cat C13 415hp..... I had it ripped out and installed a brand new left over ISX600 that I got a deal on. The coach doesn’t even change gears on hills, holds the speed and climbs anything now :)

[@marcocasillas5023]

@@LamborghiniV12M do you have that Allison transmission or a cat transmission I won't put the 600 in my coach too

[@LamborghiniV12M]

@@marcocasillas5023 Allison MH4000 which is basically a B500 with different firmware settings to handle 600hp

[@marcocasillas5023]

@@LamborghiniV12M Will it bolt up to the MH3000 at the transmission I have or will I need to get the 4000

[@heyyou509]

Two years and the engine fuel filter looks like it was never changed still got red paint on it

[@godfirst9292]

The truck he’s showing is a brand new truck, I don’t know why was stated that way,

[@starboy3384]

I have one I a freightliner matched with a 18spd and it performs like a champ. My average gross is around 130 and it pulls hills and maintains speed quite well.

[@junioranderson4975]

Cummings is back! I drive a 2017 T680 with the Efficiency Series and it has a little over 193,000 miles. Not a single problem with it.

[@SteveCarbone]

Thats so great to hear

[@stevearrington6886]

They all ways been here they have been number one since the start of diesel engines. Cummins is how the west was won.

[@worldoftrucking1465]

I wish caterpillar was still in production cause the 3406E was such a amazing sounding engine

[@100pyatt]

Unfortunately the last several years of CAT C15 were complete garbage... Wish they had the earlier pre emissions cats back..

[@worldoftrucking1465]

I own a 2005 Kenworth W900L and I have a CAT 3406E with 600 horsepower it's a grate motor had it for 5 yrs.@@100pyatt

[@100pyatt]

@@worldoftrucking1465 how many miles? Long life and ACERT don't often mix

[@rodriquezeagle7176]

Had 3 Peterbilts with Cats. 2 c15’s and a 6nz. All of them were very problematic and costly to fix. Will never buy another truck with a cat. My 98 century with a NI4 is the best engine I’ve ever had

[@scottw8480]

@@rodriquezeagle7176 my friend you obviously don't know what you're talkin about caterpillar 6nz was the best motor ever built.

[@bunker108]

We just spec’d two new fire apparatus with 600hp X15s. We have used nothing but 500hp ISX12s since 2012. I’m excited to see how these hold up in the fire service. I’m also looking forward to the X12 which should be available to us soon.

[@relaxationstation7374]

That in fact should be interesting, Volvo says that their customers absolutely swear by the power and efficiency of their 11 liter engines and I can personally vouch from 31 years of international over the road commercial trucking experience for the dependability of Detroit Diesel's fabled 12.7 liter Series 60 engine, so a 12 liter Cummins engine should be interesting to see in action.

[@DutchK75]

@@relaxationstation7374 If I were to spec a truck in the tanker game that I'm in. I'd spec it with the X12. Weight is crucial in bulk. 1,000 pounds lighter. 11.8 liter.

[@relaxationstation7374]

@@DutchK75 I own a 2013 Cascadia with a fleet truck spec'd 450 horsepower Cummins ISX, a straight 10 and 3:42 rears, I run it like an owner operator spec'd truck even though it's clearly not an owner operator spec'd truck. I am planning to eventually order a real, live, heavy duty Cascadia with a 14,000lb steer axle, 44,000lb drive axles, an 1850 pound foot rated Detroit 600 horsepower DD16 liter engine, an 1850 pound foot rated 18 speed tranny and classic 3:36 rears. I need this beast to climb mountains effortlessly, haul ass on flat land and have tremendous engine braking power to hold me back, without the use of my service brakes, while I'm creeping down huge Western US mountains.

[@jamiecanter4166]

I'm really glad Cummins is still in the game not so much for the cat I'll stick with Cummins even in the beginning

[@cruzdcruzdcruzd]

Bought a 2016 389. Still runs great. Thank you Steve!

[@SteveCarbone]

Great to hear!

[@Daniel-z2j2v]

Glad to hear the new motors are doing good. Unfortunately I still have a bad taste in my mouth having to inframe my 2012 model at 360K miles due to oil consumption. They knew it was an issue it was their mistake but never fessed up to it and let all their customers foot the bill. Paid 19K they did policy it gave me back 7K so in the end I paid 12K that should still be in my pocket. That was very dirty on their part.

[@MrMan-ol4ic]

Yeppers, I have a 2013 KW T660, Build date is 2012. Engine has only about 600,000 and change and it's consuming oil like crazy. It's in the shop now as we speak. Can't wait to hear the results of this! Lol

[@jeffwarner788]

I like the noisy air compressor..it was annoying at first but it will warn of a air leak before it’s too late

[@gutknecht13]

20 year owner op best engine I’ve ever had . 656 X15

[@TruckerJDub]

Could you do a video on the differences between the professional and efficiency series?

[@JosephArata]

Performance and efficiency series are just ECM fuel map changes. Nothing else is different.

[@colinpophal8630]

Uhhhhhhhhhh, dont answer questions you dont know the answer to.

[@Darkmatter2134]

I just dont understand why there no thought on placement on parts. Looks like someone just started adding crap and then ran lines to hook them up.

[@roadreapervideos7001]

@@JosephArata wrong, injectors and turbo are different. As well as ecu tuning.

[@tchristensen6119]

I have 2019 western star with x15..210K miles...its at Cummins getting an injector and my cam is shot...Cummins has apparently designed a new one to replace these cams when they wear out...just letting y'all know..

[@ericmendez5815]

Big rigger 61. He’s talking about other people’s engine and he’s a salesman. It’s expected for him to praise this engine!

[@colinpophal8630]

Change your oil at less intervals. 👍

[@kennetharrington2186]

I DON'T BELIEVE THAT, I A DRIVER WENT A LITTLE OVER A 100K BEFORE THE OIL FILTER COLLAPSE BECAUSE HIS BOSS WOULDN'T CHANGE THE OIL AND STEAL DIDN'T HURT ANYTHING ON THAT CUMMINS 5 OR 600K BEFORE THEY TRADE IT IN FOR ANOTHER ONE

[@supertruc64]

My 2019 with 150k just got in framed. Leaking liners. It's one thing after another with this engine for me. Exhaust manifold leaks, fuel pump and air compressor. It's been at Cummins 3 weeks going back in the morning.

[@EddieDaOnly1]

Sounds like you're better off buying an 07 Columbia with a Detroit

[@nickfehrenbach382]

Damn, that ain't good

[@Blackops6_aj]

my 2019 X15 565Hp 2050 with 43k miles the check engine light(code 555) keep on coming on. after taking my truck to cummins they said it was #3 & #6 lower pistons rings were all shot.

[@bobbyhorn7059]

I'm glad Cummins has stepped up with the x15 because the isx is pure junk if the x15 is anything like the old big cams or the n14 they have a great engine again.

[@kingjames8283]

In the past one year Oct '19 and Oct '20 I've run two X15 engines and while I like them a lot and have had no issues with them, I don't understand the banging / slapping / clanging noises these engines make especially when you get into the throttle, the louder they get. While the engines sound like they are about to spill their guts all over the highway, after a while I've learned to ignore the noise and run. I've never heard a H-D diesel make that sound before and I wish Cummins would at least educate us as to what the noise is and what effect it has on the engine if any. The noise emanates from the drivers side of engine and sounds exactly like steel smacking steel. At 125k miles, it starts hard and slow and shutdown occurs in less than 2-seconds flat which is kind of frightening but again, just ignore it and go about business. It's a great running engine, just has a few quirks that take some getting used to. All the X15 engines do it, just don't understand it.

[@rearspeaker6364]

geartrain-gears were cut for reliability, not low noise.

[@jasonforgeyandfunko_ark3373]

Had to replace exhaust manifold gasket in the first year on my 605hp x15. And yes paccar filter sucks. Sometimes i replace it every other week.

[@kennetharrington2186]

FLEETGUARD FILTER IS THE WAY TO GO EVEN WITH CAT

[@addamr2052]

I’ve had no issues at 400 hundred thousand kms in a K200 Fatboy cab towing on a b-double quad , quad axel configuration set up and i take the x15 to max revs , speed and hell and back @ 900 hundred Km’s a night .

[@truckin3799]

Need to make motors that go to at least A guy can buy brand new and pay truck off without major problems I hope this x15 will be that engine and if I keep hearing good things I’ll be buying one

[@ron8742]

How’s that working out?

[@kmafia229V2]

Plus with PDI parts and tunes

[@brianbaltzly4482]

I have been waiting and watching . I am a single truck owner operator. My cat it getting tired with 2 millon trouble free miles . I would really like to buy a new truck Maybe i can buy a new truck with confidence it wont bankrupt my business .

[@b8t135]

We'll my advice stay away from this x15 and inframe that Cat

[@jcr1227]

@@b8t135 👌👍

[@-22766]

b8t I agree I’m in the same boat I have an old 2000 kw with a C15 cat 550 It’s 20 years old but I’ll have it rebuilt before I buy one of the newer emissions motors! 👍🏽

[@juanvasquez8446]

These super truckers saying "Cummings" has me 🤣🤣🤣🤣 #Cummins

[@SteveCarbone]

Classic

[@elijahcasey9486]

Work for kenworth in renton wa!! Job is assembling parts onto this motor!😛🤩🤩

[@chloehennessey6813]

Thinking about a new Cummins X12 v2 for my car hauler. Couple years ago my neighbor put a 3208T Cat into an LR Defender II. Dynoed at 312HP and 745 torques and I bought it in January off the guy. This little Land Rover is way too much fun 😂

[@SteveCarbone]

X12 was discontinued

[@chloehennessey6813]

Peterbilt Steve i feels so misled

[@chloehennessey6813]

Peterbilt Steve for how long now?

[@MrPizzaman09]

The ISX12 was discontinued for diesel. The X12 just came out in 2018 and is going in more applications each year. It will be in the Freightliner day cab this year.

[@davidb1089]

@@SteveCarbone nope isx12 was.

[@dsotojc4645]

I’ll give a good tip. Get an APU don’t idle your truck engine and problem solve. Had a 780 Volvo did 1300000 miles but way too many injectors and sensors, list goes on and on. Don’t mind any engines as long as they’re reliable they’re ok. For now I’m liking my Cummins X15.

[@Sdukes001]

Mine was great until 218k now the parts throwing at it started hopefully it holds together now.

[@mauricionieto5778]

My brother bought one from you back in 2017 blue color 380 wb flat top. Has not had a problem yet. Thank you steve, mine coming soon.

[@junkman8523]

I haven’t had an issue with the PACCAR filter on mine. 15-18k oil change intervals in Northern Illinois.

[@SteveCarbone]

I 100% believe it is where the fuel comes from. I have customers that live up north and never have had one issue and others that cant get 5k miles.....

[@junkman8523]

Peterbilt Steve I get fuel from the local mom and pop truck stop. I’ve never had bad fuel or gelled up. Some of these larger corporate truck stops are not as good at regulating quality/treatment. Thanks for posting awesome videos and selling some really awesome trucks. I’m more of a KW fan but I certainly appreciate Petes too. God bless and Merry Christmas.

[@Fasterfuel]

2 years is nothing yet , I have D13 Volvo almost 3 years 305.000 miles never never had problem with anything all the problems will start around 400 to 500 k miles

[@SteveCarbone]

You dont know that or you would buy winning lottery tickets, cmon man...

[@Second.Nature.Lawn.Michigan]

CYRUS THE GREAT our fleet has a few with 500k. No issues. They seem to hold up better than the isx

[@daytonasixty-eight1354]

On all machinery failure rates are usually highest when they are new or super old, but rarely in the middle. Infant and senior mortality so to speak. If these make it 300k, I'd say they are well past early failure. Early failure is usually very quick. Senior failure with these you'll need to wait 10-15 years I am guessing. That's when plastics and shit will start breaking down from exposure to their environment. Electronics may get wonky by that time.

[@koolshoe6254]

@@daytonasixty-eight1354 Ok , nothing last forever anything man made will eventually break.

[@dsotojc4645]

Just wait... I thought the same after 400000 miles you’ll start thinking 🤔!!! Should I get a new truck or keep dumping money in this pit...😆😆 went from 5 set of injectors to transmission, sensors; man I can keep going. You know what was scary though... up in Montana and no place to fix it🙁 and thought I make it to a Volvo dealer before my derate clock was over.. but nope had to piggy back the damn thing. MAN FOL!FE power to you. I sometimes think my Volvo was made on a Friday or Monday 😔

[@garyshope8378]

Got 5 of them 1 egr cooler and all of them have exhaust manifold leaks not happy

[@michaelferguson1320]

i got 293 thousand so far, still running good, few issues outside the engine

[@SteveCarbone]

Great to hear!

[@edjahman]

Are you speccing any with bypass oil filters to remove soot? I believe any EGR motor should have one for longevity.

[@leecrotty658]

I see EGR always my mind attaches the word delete, I even see it in writing... But it's not there. What's wrong with my brain?

[@janinegia]

The 2017 and later Efficiency Series has changes in the valve timing that increase the expansion of the gases on the power stroke. This, and other changes that affect things like breathing, makes for a substantial reduction in fuel consumption.

[@colinpophal8630]

No it's a lower horsepower engine, read the facts, meant for lighter loads, fuel economy, no need for 605hp if your hauling light in Arkansas.

[@donwoods4465]

TKX for your video's! Your the best.

[@thomasborst5133]

Can we hear one deleted and straight piped?

[@SteveCarbone]

You wont be able to from me but Im sure it wont be long before someone posts a video like that.

[@victorbernier4765]

@@SteveCarbone hey i got a question for you the truck in this video. Is it a 579 Pete also i would love for Cummings to do a power setting. 450hp and 1650-1850 trqe.

[@josezarazua6672]

Peterbilt Steve p

[@colinpophal8630]

VGT doesn't allow a full flow. Almost like a muffler.

[@ghostbuilder3187]

Victor: You idiot it’s Cummins not “Cummings”

[@shaunhuckabee5904]

Steve, I love your vids but I'd love you to build a 2018 567 Hertiage with the X15 565hp, 2050tq, 18 speed. Blue base with silver stripe cab/sleeper with NO sleeper extensions and Army Tan frame color stretched to a 300" wheelbase!! This is just a few ideas of my dream truck!

[@SteveCarbone]

That sounds like an amazing ride Shaun! Maybe someday we will do something like that....

[@Tstatex]

I found pilot flying j fields clog then up more. Since i stop fueling there I've gotten better mileage out the pacar filter.

[@carmello000jp]

Really

[@mmtruckingllc657]

Question, I just bought a 2016 579 with a 2350 cummins 450hp, and I have all the paperwork for all repairs, the oil has been changed every 15 k miles, my question is do I stay with 15 k or go to 10k? Shops are telling me mixed opinions?

[@SteveCarbone]

Great question, Cummins will tell you to go much further in intervals. 15 is much sooner than most.

[@kennetharrington2186]

I WOULD KEEP CHANGING IT AT 15 IF YOUR USING THE OIL CUMMINS TELLS YOU TO USE WHICH IS DELO

[@davidb1089]

10k! Trust me the sooner the better

[@rowmacg]

Glad to hear this review! I’m curious if you know how the X12 is performing?

[@SteveCarbone]

Discontinued so no idea

[@MrPizzaman09]

ISX12 is discontinued for diesel. X12 is going into more and more applications now.

[@MrPizzaman09]

@@SteveCarbone ISX12, not X12

[@rowmacg]

@@MrPizzaman09 Exactly, hence I asked about how the newer X12 is performing?

[@MrPizzaman09]

@@rowmacg It's doing really well. So far it's mostly in firetrucks, cement mixers, large Freightliner dump trucks and coach buses, but it will be in the Freightliner day cabs this year. So far people are liking it and is proving to be reliable. Cummins put a lot of time and money into developing it so they can get back into the midbore market. Other OEMs as of right now aren't putting it in their chassis yet due to it being additional competition to the midbore engines they make themselves.

[@truckerron]

And... what is your thoughts today?? I've heard of many issues occurring for many guys in the field!!

[@hm8100]

I got 4 buddies, they bought 2019 brand new kenworths t 680 with cummins x 15 ,and all four had to do overhaul as soon as truck pass 600k miles

[@I_like_turtles_67]

I was talking to a friend who has a w9 with the PACCAR filter. He hasn't had issues when only running inside CA. When he's fueled up in Nevada. The blend did cause some issues. So it has to be the quality of the fuel/blend. Playing a big part in the paccar design.

[@SteveCarbone]

agreed

[@Kjtw1961]

2019 Peterbilt …had great luck with my X15 compared to ISX , but was expecting longer life , 10000 hrs , turbo and actuator , 10200 hrs ,EGR replace , 10446 hrs 446000 klm complete inframe

[@nashdavis4607]

ISX is the same as x15 same platform just common rail fuel system

[@arthurdduda8233]

2011 450 isx was good strong and great on fuel economy engine ... the problems were the dpf system.....2007 cat 475 c-15 was good engine too... have 2016 paccar mx13 and runs great only reoccurring problem is fault code 5319... no problems with fuel filter..... hey those dpf filters have a cleaning interval even if that gauge says it's clean you might want to double check with peterbilt on warranty issues if you don't clean it even tho your gauge says it's clean... peterbilt and paccar make a great truck and engine I've come to the conclusion after listening to myself and so many other drivers complaining about the same reoccurring issues with fault codes... IT'S NOT THE TRUCK... IT'S THE SHOPS AND MECHANICS NOT DOING A THOROUGH PROPER JOB... I'VE BEEN BLAMING THE TRUCK BLAMING THE TRUCK AND THEN IT STUCK ME.. WAIT A MINUTE.. THEY'VE SEEN THESE PROBLEMS OVER AND OVER AGAIN AND FOLLOW THE SAME DIAGNOSTICS/ CURE FOR IT OVER AND OVER AGAIN BEFORE FINALLY MOVING ONTO THE NEXT WHAT ELSE COULD IT BE SOLUTION... AND THAT'S A SHAME BECAUSE WE LOSE REVENUE SITTING IN A MOTEL FOR A WEEK TO ONLY GET THE TRUCK BACK AND FEW DAYS LATER BAM !!! SAME FAULT CODE !!! TILL FINALLY AFTER 4 OR 5 TIMES THEY GO OH YEAH WE FIGURED IT OUT IT WAS THIS OR THAT.... WELL.... UM .. WELL MAYBE AFTER YOU FIGURE THAT OUT DON'T YOU THINK THE NEXT GUY WHO COMES IN WITH THE SAME PROBLEM YOU OUGHT TO PUT 2 AND 2 TOGETHER AND SAY GEE YOU KNOW I BET IT'S THE SAME THING CAUSING IT AND SAVE THE REST OF US FROM GOING THRU THE 4-5 VISITS ???

[@aztxtransport2776]

Great video. Still have questions cause am in tbe market for a new truck- so which ISX ur comparing with? I got 05 ISX.

[@SteveCarbone]

13-17

[@MetalTeamster]

I started trucking in April - 1983... In this order it has been : 8v92 , Formula 350 Big Cam IV , N -14 - 370 , C-12 , C-15 , Seris 60 , Cummins ISX 475 - 1850 , Maxx Force 13 , Maxx Force 13 and lastly a 2012 ISX 400 .... And the Cummins engines have been the best by far..... 2,000,000 miles....

[@jamescollins9742]

Wow surprised that a cumanunk even lasted 2 years thats a miracle

[@duanetye8912]

I hope they have the emissions fixed. I was in a cummins shop last fall. I was told Cummins shop business 51% was DPF or DEF related.

[@MechRider89]

thats why my cummins is deleted, stupid emissions crap. at the same time i know 2 other guys with the same year petes as me that have never had a def/dpf problem..very hit and miss it seems

[@aikensbrown866]

Shit now you make me want to go buy a x15 in a newer truck. I had some many issues with my 08 peterbilt. PDI help me out with the turbo etc

[@SteveCarbone]

@Performance Diesel Inc is the way to go.....

[@michaelwright1602]

@@SteveCarbone PDI is horrendous, they have destroyed more trucks in the past few years than I can count.

[@wagnermatos5373]

Can you please read my comment and answer this question. Did Cummins fix the problems with the injector cup??? The ISX is horrible in that department. I called Cummins to order a head because obviously I had issues with the injector cups. Cummins told me that I was going to be the 138 order for a head.

[@SteveCarbone]

They did, zero issues with the X15

[@wagnermatos5373]

@@SteveCarbone thank you!!!!! I couldn’t get any answer anywhere else.

[@1555mrsmith]

Thanks for the update

[@alinmatti786]

Thinking about getting this 2020 engine on a volvo with automatic trans. I have a cm870 currently. 07.

[@jacobsimcox133]

CAT fan boys are the worst. "iF It AiN't A kItTy cAt iT's DoO dOo".

[@SteveCarbone]

Lots of truth to that statement

[@chrishull9202]

I was wondering if you could edit this video to add a few more pauses and UHHs and UMMs....thx

[@pauldeist7268]

Having low fuel pressure problems now. Changed everything. Hoping the ecm swap fixes it. I’ll report back. Good thing is not many problems with this motor so Cummins is scratching their heads on this.

[@SteveCarbone]

They wont be batting 1000 with this or any other product but they have come a long long way with this product. Good luck on yours, keep us updated.

[@pauldeist7268]

After they checked the restriction from the filters all of this work was performed because there wasn’t any or enough restriction to change the filters. As of now they changed the fuel filters and the truck is running great. Stay away from the Paccar pre filter if possible.

[@edgardomatos7742]

@@pauldeist7268 thanks ...

[@tfkfjhdjfnf5941]

Everyone is... happy ok....why...in Richard Brothers...full of the x15 new trucks 2020-2022 with under 50 000 miles?

[@SteveCarbone]

I have no idea what you are saying or asking

[@shayearl2369]

Are the guys who are not having issues all using a apu unit

[@michaelyoung3175]

Good question!!!

[@SteveCarbone]

No sir, some yes some no but Cummins will tell you idling is not an issue with this X15

[@Thecremeanbrothers]

I don’t have an APU on mine bought it back in April done a lot of idling and no issues at all love my X15

[@sicarrioh3395]

If your idling your supposed to raise the rpm up.

[@robertl3632]

2nd. Heard from cummins if you are going to idle, bump up idle to 1000, mine sets at about 920.

[@josenoyola9851]

It’s probably the bio-fuel that is causing the filter issues.

[@jacoblake2929]

If you have a Paccar fuel processor on your engine use Paccar primary fuel filter K371012 in fall/winter. It’s a 30 micron filter. I put 350k on a ‘16 ISX15. Oil/filters changed every 30k miles. ZERO PROBLEMS. Use K371011 in spring/summer. It’s a 10 micron.

[@100pyatt]

Better solution, throw the Paccar in trash, replace with Davco 👍 And use the coolant heated one so you don't have to play the micron game in the winter, sucking in bigger damaging debris

[@kenworthklass4657]

Agree. Both my 16 isx and 19 x15 came from factory with a 10 micron filter which is fine until winter...then switch to a 25 and works much better

[@prabhrandhawa2749]

I got 2018 Peterbilt 579 x15 565 horsepower and 1850 torque right now I have 395000 kms on it for 18 months bellows near egr cooler start leaking around 325000 kms been to peterbilt 4 times they couldn't solve it. Intake exhaust manifold leaking couldn't solve now I am taking to Cummins 4 time change half turbo lol yes they didn't change whole assembly who ever painted engine was a rookie or something all the paint is over my frame. Problem is still there they couldn't figure out what the problem is. Anyone help please? Thanks

[@oleksandrvanzha4522]

Have one with 100k miles under the factory warranty with vibration and low power issue, been in 5 different dealers and every one after finding out that it is under warranty can not find what is going on....

[@gregsmith1499]

I have a 2022 389 with 150 thousand so far so good

[@SteveCarbone]

Great feedback!

[@nathancreel9866]

Really wish CAT was still a competitor in the class 8 truck market.

[@lngsht8168]

True.. they make a decent looking on-highway truck.. but the c13 engine is trash since navistar makes it lol

[@jonw4501]

I'm glad cat never stooped to the level of Cummins in embracing draconian regulations.

[@lngsht8168]

@@jonw4501 I bet their employees are glad they still have jobs

[@jonw4501]

@@lngsht8168 I bet Cummins employees contemplate suicide after every work day for what a spineless, incompetent company they work for. Even gen 1 renesis wenkels last longer than is. What's next? Cummins demanding a higher minimum wage so they can pay their workers a higher wage?

[@Its_That_Guy_Chris]

I'm set on a w900l x15 w/565hp. What mods should I do to it right off to keep my down time for maintenance as low as possible?

[@ptx777]

Bryan Wittenmyer full delete

[@rd5991]

Davco filters

[@MechRider89]

change your oil earlier than the dealer says to, i do mine every 12k miles.

[@johnrusselllubo]

The best modification that you can do is have a proper MINDSET. Drive a truck the way a truck is suppose to be driven. Nobody is pointing a gun to your head and tells you that you need to have big power plant under the hood to outrun and outpower the rest of the trucks out there.

[@kennetharrington2186]

IF YOU RUN FLEETGUARD FUEL FILTERS AND OIL FILTERS AND USE DELO OIL OR DELVAT OIL OR VALVOLINE WHICH IS WHAT I USE IN MY DODGE CUMMINS WORKS PRETTY GOOD TO ME EVERY 15K YOU'LL BE GOOD TO GO

[@SemperCrayon]

6 trucks all down for fuel pump codes, personally I'm thinking software issues as they all are going in to protection mode.

[@The.Real.Timmii]

Cobra 29 still the cb of choice :)

[@SteveCarbone]

Yep

[@jd426]

Whats up with the clogged fuel filters in winter

[@tomcowart]

My 18' 389 with Cummins X15 Performance needs an overhaul at 339,000 miles. Engine leaked coolant since the very beginning of running it. No one could find the correct issue. Instead I paid for a new EGR this past December. I believe the Oil Cooler was changed under warranty. Had to replace the coolant tank once due to high pressure trying to blow off the cap. Was told that I cross threaded the cap wrong, yeah ok.

[@koolshoe6254]

Liar liar pants on fire

[@tomcowart]

Koolshoe 625 really. Its gets better, first day after picking up my truck from the in-frame, my engine blew a hole in it. I now have a brand new engine in my truck.

[@hihaveaniceday9386]

@@tomcowart Jesus even congress hides it when there lying

[@tomcowart]

@@hihaveaniceday9386 I would tell you to call the dealership that did the work to verify but I do not feel like throwing them under the bus so to speak. Send me your email and I will send you pics of old and new engine. Is my story really that unbelievable? One cool thing about it is instead of having a 100,000 mile warranty with the in-frame, I now have a 250,000 2 year warranty with the new engine.

[@TruckingToPlease]

Had our X15 2020 565 hp for 3 years. Sleeved the cylinders at 423k in Vegas due to low or loss of compression. We run intermountain & northwest year around, and gelling is frequent when transitioning from south to northern fuel supplied depots. We always carry 2 filters for everything. Currently have 542k on a 3 year old truck. Replaced the transmission harness in Tucson, clutch replacement in Cheyenne, windshield fluid tank in Missoula for a stuck float, and 2 DEF pump replacements (Mobile/ West Memphis). We've had more shop time on the Pete than a Volvo, Freightliner, and International combined for a 3 year old truck.

[@Pete-from-Tn]

ISX was just like the gas engines starting out. Everyone was having issues early. Know of a lot of cars and trucks back then. Some could not get 30,000 miles. Smog stuff was stopped up. Look at those today, for the most part. NO issues on gas engines now. Everyone rushed the Diesel design in way early. Or waited late in the game to start testing. Should have been testing in the 80's. For the release years later.

[@agig1111]

If you use Davco will it void the warranty if you don’t use Fleetgaurd

[@SteveCarbone]

I dont believe that is true....

[@rono3045]

It's too bad kitty cat hopped out of the game but I ran some construction equipment with some engines that have had somewhere around 15 16 liter size motors in them and if only those were put in semis these days kitty cat would still be the king I know it

[@SteveCarbone]

True, if the worst motor of the past 20 years was back in the game and better it would be a good thing.

[@xrigtrk]

I'm a Cummings man I cut my big road teeth on a 350 back 33 years ago.

[@kpelkey6829]

60000 on mine I've got a vibration around 1200 RPMs under a hard pull dealer can't seem to find doesn't do it all the time to me feels like the engine any ideas? Don't get me wrong I absolutely love this engine other than that it's been trouble-free and Pulls like a mule!!!! If I was to describe the vibration is very similar hitting rumble strips at about 45 miles per hour

[@SteveCarbone]

Hey Kurt, how much free play is in the clutch pedal? I have seen this cured a couple times before by having a little more than usual free play but could also be in the driveline. Just throwing darts here, hope all is well!

[@kpelkey6829]

@@SteveCarbone ten 4 I'll give it a try thank u sir

[@robertl3632]

k pelkey and steve. I have the same issue. Vibrates so bad I have to get out of the throttle. I took it in to dealer and they drove it with a sensor but did not find it. Told me it was the engine needing broken in (about 20k miles). Seems like drive shaft or engine maybe. I hope to get it to another dealer to have it checked out. Bought it from Tulsa (sorry not from Steve directly)

[@kpelkey6829]

@@robertl3632 I know what you mean I have to get off the throttle also when it does it real bad. Mine doesn't do it all the time does yours? I haven't got mine back in to have the clutch checked but when it was new I had it adjusted because I was getting a vibration which the adjustment did take care of it that was a completely different vibration than what I'm feeling now. Seems like a fuel-air engine issue to me which should throw a code but who knows keep me updated on what you find out and I'll do the same

[@robertl3632]

@@kpelkey6829. I'll keep you posted. I noticed the vibration ever so slightly when I drove it bobtail after picking it up. However, when loaded heavy and up a grade it becomes so bad, clearly something is wrong. It helps to be in a lower gear (higher rpms) but that prevents me from being down where I want torque. I'll check out the clutch fee travel but I am concerned Ill adjust the clutch brake out. I also noticed that the driveline had been moved after painting. I was told that was normal as they do a run at the factor to adjust once assembly is done. It does not do all the time, or at least it's not as bad. So at least I believe it narrowed to the the fuel/air issue, clutch adjustment, or driveshaft. Sigh.

[@godsgreatforever5973]

I got a brand new Peterbilt same engine, start losing coolant right away, service at Peterbilt don’t really want to fix truck for some reason, truck is under Warranty, any ideas on what could be, thank you

[@SteveCarbone]

Thats hard to hear about a dealership. Any Cummins facility can handle it. You dont have to go to the dealer where it was purchased.

[@godsgreatforever5973]

@@SteveCarbone, Peterbilt at Amarillo Tx scam me, they said that it was a loose hose clamp on radiator hose, I took it back to Peterbilt at okc and they’d found the problem, they said it was the egr cooler witch that’s what I ask them to check the very first time I went there, I’ll find out if that’s what the problem was, thanks for the feedback

[@sukhs1317]

Hey bud this might be a stupid question but what is difference between 1650 torque or 1850 torque engine. I like 500 hp and run most of the time plain roads.

[@maxespinosa02]

Does this x15 have a significant amount of issues less than the current paccar mx13 motor?

[@diesel379x]

From my experience my x15 has 288k miles on it and I have not had any issues with the emission side of it. Now I did have camshaft issues at 213k. Had to be replaced. Ran my mx13 till 456k. Had check engine light on every over week. Blow head gasket at 359k two injectors went out. 9 nox sensor over 3years I've had it. I'm having better luck with Cummins than I did with the paccar engine.

[@maxespinosa02]

Kendrick I appreciate that insight. But was that mx13 the updates model that got rid of all those sensors? I have an uncle that owns an 12 model year paccar and it’s been nothing but problems also but it’s first generation. I don’t know anyone with the 16 year model or newer

[@diesel379x]

@@maxespinosa02 mine was a 2014 model paccar. 500hp. I think they made some changes for the 18 models but I cant speak on those cause I didnt have one.

[@maxespinosa02]

Kendrick thank you again

[@diesel379x]

@@maxespinosa02 no problem.

[@tanuki379]

Check the truck sale papers there are a lot of 2 or 3 year old trucks with 350-450 thousand miles and this motor for sale due to too many problems

[@SteveCarbone]

Show me an ad with an 2-3 year old truck 18-19-20 with a Cummins and a rebuild. Please post the link here for all to see! Best of luck....

[@jeffallbright4449]

I know this post is old but the trucks you speak of for sale are generally fleet trucks that are being replaced with newer trucks. Fleets like to keep them in warranty.

[@Hydrostream1972]

All time fav. Motor. ...m11

[@Johnnyondaspot-t5x]

Just bought an X15 500 horse and notice a loud clacking noise at idle and when taking off. Is that normal???

[@raymondsilva3645]

Here in Hawaii it’s the def system so it derates the motor till fixed

[@bdouble69]

Australia 🇦🇺