Just turned over 30,000 miles on my 2015 Ram 2500 Cummins today pulling our 9000# car trailer. It's getting about 3mpg better than our two Ford 7.3 trucks, tons of power and unbelievably comfortable. With the load behind it, it will usually be at the speed limit at the end of merge ramps.
Absolutely love this truck!
Bill J., Lexington, KY