Why not just put in into the fuel tank of your car ? Even with water, a car's engine wouldn't react to it noticably at all,, or what I did, when attending flight school. Just pour it into a metal drum or whatever, and when full, just fill it in the fueltank of my car,, It works. However I should mention that the flight school I attended is in Norway and fuel here is rather expensive ( 1,2$/l)!!
that's around 50$ for a tank of fuel.. Attending flight school isn't cheap either so doing this would keep my car filled up anyway
