F250 6.4 diesel ,stock size tires, it's programed,but don't know which one. Had a great mechanic work on it. I get 18 to 19 in town. Freeway up to 26.Lets do a data base thread on what kind of fuel mileage you are getting in your truck.
Post your trucks year, motor and any mods with the fuel mileage...minimum commentary.
My 2012 Tundra with the 5.7L, Icon suspension that lifts it about 2" and 33" Toyo's is getting 13.6 all around [mostly city] and gets 15 on the highway averaging 75 mph.