I use to own a 96 f 350 4x4 with a 460 it was so bad on gas i had to sell it.the thing got 7 miles to the gallon at best.you will never get good gas miles with that thing.i could see my gas gauge drop as i was driving.but on the good side its a beast with a lot of power thats a power house for work.but on gas it sucks it down.