I can burn much less then them and I'm running a mild 540 in a boat that'll weigh close to 6000# on the water. My comfortable cruise will beatthe crap out of them and they not being able to keep up but will burn 2x the fuel.In theory they look very tempting. But you will have a lot more fun with a regular boat. When I used to own two Seadoo jetskis I followed the Seadoo boards quite regularly. Most people buy them and sell them the same year. You can probably get a used one almost anywhere. Yes, they use a lot of gas compared to even a boat with a 350 V-8! My Seadoo GSX used 13.5 gal/hr at full throttle, usually about 25 gallons a day. My brothers 25' V8 powered boat uses much less, typically 10 to 15 gallons a day.