Comparison: Paccar MX-13 vs Cummins ISX15 (2014-17 Models)

[@ThePaccarWhisperer]

I have a deleted MX-13 with deleted egr, PDI exhaust manifold, fass fuel system with a ported intake manifold and Peterbilt aircell intake spacer. 7 inch pipes being installed today. With the delete alone hp and torque were taken 546 hp 1850 tq. With pipes, both manifolds and intake spacer Im sure she's pushing well over 600 hp. She's no Cummins but better believe she be kicking ass and taking names!😎💪🏾

[@jakamanewb]

Same here and love it!!! Please note your #'s are at the wheel #'s not the flywheel. I'm also about to roll over the million mile mark as well!!!

[@twash254]

Where can I get the work done on my daycab with paccar

[@ThePaccarWhisperer]

@@jakamanewb About to add PDI clutch and aftermarket flywheel, upgraded turbo, and charge air! Wish me luck!

[@ThePaccarWhisperer]

@@twash254 where are you located?

[@domesticatedwolverine4152]

How is the throttle response after the delete?

[@breannaspeed3745]

Thank you for the detailed review of the two engines. I have a MX13 in a 2015 T680 pulling a 2016 53’ Grate Dane Refer. We run cross country and I must say that the PACCAR does fine in the Midwest flat land. When we hit the Appellation or Rocky Mountains, both speed and fuel mileage are not good at all. Also, the engine brake does little help going down the mountain.

[@ThePaccarWhisperer]

If you want POWER delete it. Currently pull paper rolls out of SC to North East and Midwest. Can pull the gorge in Va fully loaded at 79k at 78mph! Left Lane! PACCAR 355 rear ends 13 speed 😉😎🤷🏾‍♂️💪🏾💪🏾

[@Brsrafal]

i hear u on that engine break switch its bs even on highest setting you better off just downshift you can barely feel it ... I haul pipe in northeast 287 80 78 area .

[@terrellscaife2411]

Isn’t deleting an engine illegal

[@benjaminturpin2749]

@@terrellscaife2411 no what are you a rat or something?

[@isaacrubalcava1568]

@@ThePaccarWhispereryou like the pacar engine?

[@wrench4it47]

I'm a journeyman diesel mechanic, I have been into both of these I was skeptical about the paccar at first. The cummins isx15 dropped a liner getting exaust in the cooling system at 450,000 miles. Had to basically inframe it. The paccar mx13 is on a feed truck and it works its ass off and I had diesel in the cooling system at 950,000 miles. The paccar is a workhorse & its dam solid. Like the Cummins usto be.

[@richardmccay7943]

Paccar proven solid as Rock . Got one 985,000 miles never been opened

[@vicenteflores9711]

Exactly! mine is about to hit a million in a few weeks 2013 never been opened up only valve adjustment, about to start rebuilding it, preventive maintenance

[@michaelnewbury1279]

Would like to know how you do your oil change intervals and maintenance . AKA milage. TY.

[@dedrickgeter6648]

I just purchased a 2017 kentworth with a MX 13. It has 500,000 miles. Any recommendations on preventative things I can do to keep my truck running as long as yours? Thanks so much in advance for your reply.

[@BlessednFree]

@@dedrickgeter6648how’s it going with your truck now

[@jaimemurillo4136]

Well i don't know much about diesel engines but so far my kenworth t680 with paccar in it has 750k and is doing pretty good.

[@morrisdennis]

I'll stick with my 12.7 dirty Detroit

[@bradchoq]

Cummings site says x-15 weights 3152. Paccar weights 2800

[@thomasdragosr.841]

I believe the PACCAR engine block is made of compressed graphite instead of cast iron or aluminum. That's where they save 500 lbs.

[@vikramjeetsingh4260]

Honest reviews 👍🏼

[@michaelrocker9000]

There is only around a 450 pound difference between the Cummins and the Paccar. The cummins is better when it comes to climbing hills and the Jake brakes are better going downhill.

[@jorgeduran4960]

Does the engine brake work as good on the paccarr vs the cummins?

[@Jerzeyguy]

No

[@benjaminturpin2749]

Yes they all work exactly the same

[@TruxasSales]

It could work a little better on the Cummins because it is a bigger engine.

[@richardmccay7943]

No they don’t ! The paccar engine brake not near as strong

[@timadams7467]

Mine does pretty good, no real complaints

[@arisk.ramosbautista1283]

Perfect 👍 thanks

[@transparenttransportationl2985]

TRUCKERS STAY AWAY FROM PACCAR ENGINE OVER THE ROAD . PACCAR ENGINE IS ONLY GOOD FOR IN TOWN HAULING ONLY . BEST IS X15 CUMMINS 450 TO 500 HP , 1850 TORK EATON TRANSMISSION ENDURANCE , Front AXEL 13200 IB MERITOR , REAR AXLE 40000 IB MERITOR , REAR END RATIO 2.79 DIRECT DRIVE , If You are ordering manual transmissions 10 speed or 13 speed than go with 1850 TORK TRANSMISSION WITH 3.36 EATON REAR END RATIO .

[@seagulldeagle994]

Do you like Extended holidays with no pay .... and Don't wanna live your life choose Paccar . Mx 13

[@antor.j.medrano]

Love cummins.

[@ernestpassaro9663]

I would take a Cummins

[@eyebok]

They both suck

[@boatlover2296]

Pacar sucks but the cummins isn’t a whole lot better. Dam I long for the days of the 6nz

[@rc5693]

If you don't buy a paccar already turned up to 500hp, good luck getting it turned up. Paccar doesn't like to do it. If you can convince them to it's over $3500

[@ThePaccarWhisperer]

Where are you located buddy? If you want power you have to delete it.

[@farhad_222]

Hello Friends, I have a daf model 2020 mx13 engine, engine retard. Why does this engine damage the valve stem, and I have seen several cases that their valve stem also breaks quickly, and this is a weakness for this engine. Is this weakness due to the construction of this engine or is there a reason that causes this problem, please guide me, this is a problem. Thanks

[@jorgequinterolopeztorontor572]

How many km can we do on Paccar with out major things or rebuilt

[@TruxasSales]

check the paccar website. i think they say over 1,000,000 miles

[@celbuurgall3486]

I wouldn't buy PACCAR product at all. I know PACCAR product very well and I know how they price all these parts and how they manipulate the market. Stay with Cummins or CAT and stay away from PACCAR product.

[@adfasdfasdfluy]

CATs been gradually discontinuing products and parts are getting trickier to get a hold of. You have to rely on the aftermarket. Cummins is the safest option. But I’d pick a PACCAR engine over a CAT.

[@gotubo]

Agree totally with you !!

[@TheDj2tallchicago]

Cats are fun until they break and you can’t find parts for months

[@scottschrader1630]

I love you CAT fanatics at 4.5 Mpg lol yes I've has 1693 3406 and 3408 all piss poor on fuel

[@eldyvalles8662]

@@TheDj2tallchicago CAT parts are everywhere, they pride themselves on just selling parts tf ?

[@junmabs]

Where is your shop located?

[@TruxasSales]

We are located in Houston, TX. You can check out our website for more info: www.truxassales.com/

[@morrisdennis]

Paccar needs a better / longer warranty 4 me to take a chance on one, ive heard 2 many horror stories 😮

[@carboy6814]

Are these engines same on kenworth t680?

[@TruxasSales]

yes

[@bradchoq]

Also, Paccar has push rods and the overhead needs to be ran every 50k miles. Cummings has an overhead cam that doesn't need adjusting

[@morrisdennis]

Paccar has a a very short standard warranty...

[@huddy2588]

DEF DELETED is the best option possible. It's useless extra system.

[@lionheart7431]

Paccar are good trucks but the problem is only the stealerships have computer programs to fix them and that's where they make a killing off drivers

[@TruxasSales]

that's how it was the first few years, but now a lot of shops have the programing including ours. We fully service both engines.

[@morrisdennis]

2 recent dealerships that i spoke 2 peterbilt and kenworth and they both told me 2 avoid paccar...

[@PaulMcLove]

‼Super 👍😉😀

[@fboest]

let the Cummins stay for generators and bulldozers

[@rolandolopez2036]

Paccar trash

[@ralphkrahn7440]

IXS -15 as per a good technician Stay away from Paccar ,need engineers to fix 👎Paccar

[@kentr2424]

Keep PACCAR out of your truck and keep your truck on the road (especially the MX-13). PACCAR drivelines, quite frankly, suck. They won't stay out of the shop! I drove three different ones in two years (a '15, '17, and '19) in Peterbilt 579's running OTR and two out of every three trips (3000-3500 miles/trip) they'd be in the shop for some engine, transmission, or DEF code.

[@anthony1636]

I would say completely the opposite. We run a fleet of 30 trucks 15 with the MX13. 10 with the Cummins isx. And five freightliners with the Detroit. Our shop will tell you that Number one for reliability is very close between the MX13 and the Detroit, but they prefer to work on the MX13. Our Cummins powered 579`s actually spend more time in the shop with breakdowns than the MX13 or the Detroit. Plus we do get better fuel economy than either the Detroit or the Cummins. We are slowly moving over to the MX13 for the fleet, and we will continue with Detroit powered Freightliners. But as it stands we cannot warrant the higher cost that the Cummins costs as a fleet user.

[@ThePaccarWhisperer]

I have 2 579's with MX-13 engines. BOTH DELETED. One ive had for over 5 years and more than 500k put on it. Currently sitting at 786k and the other at 650k. They have been deleted for the past 2 years. I dont know who does the maintenance on those trucks or better yet just shitty drivers. Straight from the HORSES mouth I LITERALLY drive the living 💩 out those MX-13's and boy when I tell you those 'WHORES haven't let me down yet! Hear me clearly NOW?? Them B-I-T-C-H-E-S haven't let Daddy down yet!! Lmao and Daddy EXPECTS A LOT. When I say I'm overly impressed with the performance MAN. You gotta get that DEF crap off it 1st and then its literally like a catepillar turing into a butterfly! 😎💪🏾

[@wrenchfriday]

Pre 2019 90% of paccar engine related codes were 1 trip codes- meaning if an anonymity showed up one time you would get a CEL on the dash. Most of the time these codes would really just be an anonymity and not an indication of an actual problem- which was frustrating for the driver who always has a cel and the tech who can’t figure out why the truck is throwing a code when everything seems fine. Post 2019 only 27 codes are one trip codes and the remaining 300 or so are two trip, so you won’t see any false CELs anymore.

[@scottschrader1630]

Humm I've had two paccars both bought one in a 2015 kw 660 set at 500 it ran trouble free for 650000 miles I traded it for a 2021 kw990 set at 510 180000 trouble free miles so far . Easy to service when changing oil the only time you go under the truck for is the drain plug I was a cum.ins guy not now I've herd Cummins stories too when some one tells the truth lol ran side by side with a 500 hp isx15 he used 1.5 mile to gallon more than my paccar at $5 a gallon I like taking that to the bank

[@jamesklee9980]

You can't compare apples and oranges!

[@TruxasSales]

Apply is hard and crunchy and sweet. An Orange is soft tangy and sweet.

[@zalo_tuandriverga]

paccar for fancy brand trucks Cummings is for working class trucks

[@kingriik1447]

Lol paccar is a no go

[@jorgefonseca9225]

Of course the Cummins it's better in everything 👍 because the paccard it's a bigger piece of crap engine 👎🤪🤪

[@crocket1971]

Of course...Because its American

[@shimshonkarbasi2631]

I AM NOT EVEN GOING TO WATCH IT I HAVE 3 MIL + DROVE THEM ALL, MY NICK NAME FOR PACCAR IS " BLACK ENGIN OF DEATH". Cummings hands down is 1 #2 dd15 that is it no other engine will I drive. FYI INTERNATIONAL WAS bought our by Volkswagen they will be heavy competitor in few years.

[@Druidvasia]

Both are junk