"I'm for anything that will help extend my gas mileage at today's prices. My only experience with acetone was spilling some on a tile floor" There is a discussion of adding acetone to gasoline going on at Shop Talk Forum. Gas prices have come down a LONG WAY around here. I can buy regular unleaded for $1.99 numerous places in San ANtonio now. I'll bet if I looked hard enough I could find it for $1.97 or less.