I know you weren't asking me, but here's 2-cents with our 2520 XLD (deep-v), 300 Yamaha. We average 2.1-2.2 mpg, around 4200-4300 rpm, 30 mph, Usually 2-3 people, heavy 1" all S/S bimini, standard gear/chairs/coolers/ fishing tackle etc. When 200 gallon tank is full, it's more like 4500-4600...