I have a 2016 Moomba Mondo. We don't have a gas station on our lake. With the boat on my Boatmate trailer I don't get a full tank at the gas station. In order to get an almost full tank I park the boat on the trailer on a downward incline and I get 6 to 8 more gallons by manually pouring in gas cans, and the gas gauge is still slightly below full. Is there a better way?

Thanks much.