Looking at some 579's

Someone had one maybe @Long FLD

 

I don't know much about X15, but the other day I was at Volvo dealership, I overheard a parts guy giving someone quotes at $10k for turbo and I think $1800 per injector

 

If @Midwest Trucker is still around i think hes running a similar setup? I know my flatbed experience is not gonna help you. Ive never gotten better than 6.5 averge pulling flat with the cummins. Im guessing a van will be in the mid 7s have no idea tho. .. the x15s have the same problems as the 2350s and the 2250s of dropping liners and blowing the head gaskets. The last company i was with was rebuilding a couple of then before 250k. And then others would have 0 problems at all. Seems like just luck of the draw..well they are easy to work on, if thats any help. You can have the head pulled in a day if ur good with wrenches. I think the silent killer in the cummins is the emissions stuff, especially used trucks you really dont know what u got or how someone maintained it. If at all.

 

Cummins emissions changed to single canister set up in 2017EPA . Maybe some late 2016 builds but 2017MY and up.

Regen intervals went from 25 hours to 100.

 

I do some work for a bunch with 579 Pete’s. 21 models i believe. Pulling high cube vans. 450hp X-15 13 speeds (not 100 percent sure on ratio) any way their dash display shows 7.5 and up when they run one over here for service

 

Honestly these days I think a Volvo would be a smarter choice than a Paccar product.

 

Me personally if it was my money and i was buying newer i would go with a kw and the 990 or the t680 . The interior design is like 200 times more better than peterbilt.. the 500 series peterbilt dash and sleeper is a bit rough on the eyes compared to KW... Last company i was with, specced a bunch of t680s with 13 speeds and x15 cummins, agl400 suspension stretched to 300 wheelbase from the factory. No fairings or any plastic crap on the tanks . All 2023 and newer. The one in the pic is a 2025. really nice rigs, some of the nicest trucks ive ever run. Perfect if ur doing otr or regional stuff.