I have a 31 Tiara open with Crusaders 454's 350 HP carb I get .8 n/miles per gal. average. I cruse @ 3250 RPM 24 nts 32-33 gals per Hr. At 3000 RPM I burn 27-29 Gal per hr. and still get .8 n/miles per gal. At 7-8 Kts I burn 6-7 Gals per Hr. Hope this will help you Danny El Broko 3
don't go for the aquasport. it's a gas guzzling hull. rides great though. my father had one with 351 fords. cruises at 3200rpms 18kts for its most fuel efficent speed. this boat doesn't have a chance of getting 1mpg. fuel injected or diesels is the way to go. some boats seem affordable with diesels, but they're underpowered and they're very slow.