I should add when light on fuel and only one or two people onboard I also run 2.1 mpg. I also have a lot of upgrades. FLIR, Outriggers, center rigger, 24" radar on a pedestal, 40' of chain on my anchor, Fridge, fishing gear, propane grill, ECT... also running 4300 RPM; however, I get 30 KNOTS...