a previous motorcycle sales manager in a shop i worked at had a #$%*in' cigarette boat.
2 454's bored out to 480's... 1200 ponies on each one.
got 12 gallons per mile... one wide open run up lake havasu and putt back over the course of the afternoon and that was basically a tank full.
topped out somewhere around 120-130mph... thing was fully decked w/ sleeper cabin, bumpin system and white leather and mirrors.