The new tow rig, 2009 2500 Chevy extended cab long bed with a Duramax Diesel and an Allison transmission weight 8100 pounds 17 to 11 mpg pulling boat mileage dependent on towing speed and tail or head wind.Boat and trailer 1/2 fuel 1/4 tank of water weighs 5540. Loaded for cruising 6000 pounds +