I run heavy and my fuel burn yesterday on a dive trip I burned 64 gallons and the total trip was 66 miles. Cruising at 4200 23-26 knots in roughly 2-3 wind chop. When I say heavy, 300 gallons fuel, 8 full grown men, 16 dive tanks, 320 quart cooler full of ice, full water and my lunch. Rpm gph I...