I traded my 02 SD v10 for my dodge a couple of months ago. The cost per mile went down from the start. I tow a boat and trailer 6500# across the desert and through the mountains. v10 towing 7-8 mpg, L600 11-12 towing, v10 city 10mpg, L600 14mpg, v10 HWY 14mpg (good day), L600 17-18. V10 fuel...