We just finished a 115 mile trip, averaged 17mph, burned about 25gal give or take a few gallons. Honda 90hp, 2 adults 2 kids, 2 full coolers in the cockpit with gear for overnighting. Came out to about 4.6MPG. We had a god bit of no wake zones and ran WOT a lot too on the way down, 24-28mph...