Towing 16,000# Gas 6.9mpg, diesel 10mpg 116,000 miles needed towing to pay off the diesel upgrade Empty Gas 16mpg, diesel 19.9mpg 650,000 miles needed to pay off the diesel Video
Bottom line, if you need to split hairs on how many cents a gallon your fuel is, you're better off with a truck that's depreciated out and then this whole discussion is moot.