After a full career of serving my country, I'm buying a truck!

Agree with pretty much everything you posted, except that my ISX rocked when it came to fuel mileage and power. I had a 550 6nz that would barely keep ahead of the ISX on an identical pull, and fuel milage outta both of them was really similar. That said, I do believe that that motor was assembled in a CAT shop.

 

I've passed multiple Detroit powered trucks pulling identical loads up hills with my 550 cummins. I'm averaging about 50L/100km right now pulling trains. My 4:30 gearing doesn't help... Now how about those max force motors! Lol

 

Yeah but it's still an ISX

 

and your manifold pressure is probably at like 60lb while you're doing it lol

 

If it is a DPF-only ISX (EPA 2007 or 2010? I forget), run away and don't look back lest you get turned into a pillar of salt. They are evil and everyone associated with them is going to hell... or should. And if it's a Maxxforce don't even get in the truck or you may spontaneously combust. DPF & DEF ISXs are a significant improvement. This comes from three years operating a number of trucks (mostly Prostars) with several of each engine type. My Detroit experience is all pre-EPA so I have nothing to offer in that regard.

 

Cummins has made physical changes to the ISX 15 motor and to the DPF system (but not to fundamental flaws in the catalytic reducer). The changes were necessary because there were egregious engineering errors in the ISX 15. However, all is not well in Cummins Land (which is in epicenter of the hellfires of eternal damnation). The company is in trouble because it has grievously injured customers with gay abandon and takes advantage of their plight by screwing them for even more money throughout the life of the motor. Cummins is using its still-defective ISX 15 to produce ill-gotten cash flow from its customers instead of fixing the problem. Cummins is profiting from the misery it has caused to others. There are pissed-off customers galore. There are lawsuits galore. In any other business than trucking (or computer software) Cummins would be out of business by now.

 

I just did a trip to Hinton and back with a set of B Train end dumps. Tractor was a 2013 Coranado with a DD15 @505hp. I had no problems at all on the power end.