Overall range of Seacraft 18

[Greno]

I have an 18 with a 175 looper. I have a 47 gallon tank with a usable amount of about 42 gallons that is based on pumping the tank empty through the bulb. I try to keep a full tank and have not yet run more than 25 miles in one day or more than 48 miles on a tank before filling it up. The fuel gauge is as accurate as most are and is off a little. I cruise at 28-29 at 4200 rpm with a 17 pitch prop. How is the range of 18's at cruise. Obviously my engine is an old gas guzzler, but what do folks with 2 strokes get? Is 2 mpg a good estimation for most folks?