I probably have at least 10 gals of boat fuel: gasoline with TCW3 mixed at a 50:1 ratio. Rather than stabilize it till next summer, I would prefer to use it up in my automobiles. How much should I dump in a 20 gal tank prior to filling so that I don't have too much oil? I don't mind "over diluting" it to use it up but would like to get the cleaning benefits of the TWC3 if possible. Would probably run it in my 91 Chevrolet K1500 primarily.