Cummins will eat these guys up in durability, They have about 80% more bearing surfaces on the crank (the guts of the motor). A v8 of the same cubes has the potential to make more hp but put all that on a small crank and it doesnt mean a thing. Duramax is really Izuzu, they were spinning bearings when introduced, to pull an injector you have to pull the head, what a joke. The power joke has a variable vain turbo, not durable at all, too many moving parts. If you look at what is moving freight up and down the highway they are not v8's. The B series cummins are rated to 60,000 gww's, the others are rated at 30,000 gvw's. Dodge has had 11 Cummins run over 1 million miles and dozens over 500,000.I am a Dodge man, always have been, and would gladly buy either of the other before anything Japanese. One other thing, and I think I am still young enough to say this(bumper sticker said)...... I would rather be cummin that strokin................haaa