My 2003 2400 SCR real time numbers. 305 carb w/ alpha, 14.5 X 17 prop. 2094 gps miles, 993 gallons of fuel, 182 hours; equates to 2.11 mpg and a burn rate of 5.5 gph. This is a composite average as the time in no wake zones is probably 1/4th the time. The highest I've ever recorded was 7.1 gph. I cruise at 25 mph.