I'm still holding judgment on the new Cummins until the real world numbers come out. As much as I'd like to have seen Ram use one in their half ton truck, I personally don't feel the 5.0 was the right engine for a half ton. The 3.0 is doing wonderful in the Ram, pulls down solid fuel mileage and will tow anything a half ton truck is capable of towing. The 8 speed trans keeps the engine right in the sweet spot. HUGE difference between it and the 4 speed slush box in my dinosaur, built trans and all. My neighbor down the road has had one since last summer and puts several hundred miles a week on it for work. It has worked flawlessly so far and returns a consistent 25+ mpg on the highway. I took a ride in it one day to help him pick up a new lawn mower and it is a great handling rig. Engine/transmission works seamlessly together. Aside from the anemic payload ratings I'd say Ram really hit it out of the park with this combo. I'm sure the Cummins will be a great engine but I'd be very surprised if it returns the same economy as the Ram, to me that's what buying a light duty diesel pickup should be about.