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 👍

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!

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

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

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. 👍🏻

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.

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

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

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!

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.

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.

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

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.

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

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

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.

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

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

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.

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.

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.

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

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

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.

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

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

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.

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.

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.

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

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.

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 .

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 .

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

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

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.

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 😂

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....

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.

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

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

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

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..

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.

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.

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

Plus with PDI parts and tunes

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

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 ???

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!

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

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

TKX for your video's! Your the best.

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

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.

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

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

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.

Remember people, we’re not talking about your CAT, Detroit Engines. Looks like you just want to brag about how good your engines are. How many miles you have ahhh ahhhh.. think🤔🤔🤔🤔 out with the old in with the new... technology is evolving, getting better than your flip phone. Remember when NASA need it a 10 x 10 room to run a computer???? Now that 10x10 we have it in the palm of our 🖐.

I'm a cat guy through and through. All good stuff i here about cummins is only coming from either the cummins dealers or cummins themselves, not from the owners. You can't even pick up any conviction in his tone of voice

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

Thanks for the update

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

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.

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.

Series 60 all the way.

Can we hear one deleted and straight piped?

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

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.

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

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

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

Cobra 29 still the cb of choice :)

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

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

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

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....

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

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

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?

And ah...how many time? You haven't said crap to make me want one... Even thought I'm in the sleeper behind one. Just rolled over 250K and the check engine light is on. Yes! All levels perfect. What's wrong? In a 2023 Pete 389

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

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

X15, good for me long as it's not yellow

All time fav. Motor. ...m11

Australia 🇦🇺

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

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

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.

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

Thanks for the update, pull toy here.

I have no use for salesman when the heir job is to “sell sell sell”.

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?

Sounds like the same old story get ridof your old engine and buy this new one it has no problems !!!

Disagree N14 wasn't Cummin's best, the best was the 855 Big Cam IV 400 hp. engine was their best engine, all mechanical.

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.

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

Under recall as of March 29, 2021 certain models

X15 400hp ratio 3.25 is good for pull drive van