Just last week ran 47 straight hours with 165 volvo in an Atlantic 30 between 6 knots (against current) and 8 knots (with current), also ran the 4.4kw generator for 8 hours with A/C load, in the ICW and up the Achafalaya River. 1800 rpm going and 1600 rpm coming back. Total fuel burn 84.5 gals. Haven't figured out the mileage yet, but left slip at Cypremort Point, La. and travel about 10 miles north of Krotz Springs, La. and back. Very happy with the 1.8 gals an hour burn.