Originally Posted by barry1me
There was an article in Diesel power magazine last year featuring a 97 Ram 3500 Dually that hand calculated was getting 30mpg. I have the mag at home.
Best mileage I ever got was 19.5mpg 100% highway 70mph cruise in the summer. That was with a 2005 F250 FX4 with 33's 6.0L
I have it also, but keep in mind it was 2wd, and I think they did a bunch of other fancy stuff