[backhoe]

The old-time Baja racers used to add acetone to Mexican gasoline to raise the octane and I followed their advice when using superchargers on the street... about an ounce per gallon, as I recall.

Caution, however- some modern fuel-system components do not take kindly to acetone or other volatile solvents, like methyl alcohol. I really would not try it in a modern vehicle, unless someone else tried it first without problems.

[Cuttnhorse]

Waaay back when I was in my teens, I was an avid GoKart nut and we used to modify the heck out of our two-cycle engines...bore, port, polish, windows in pistons, multiple carbs, and we used to fool with metyhl alcohol fuel mixes. We always added acetone to our fuel mixes...as I recall, acetone helped to light off the alky mix; alcohol fuel mixes made the engines hard to start, but once they lit off, they did go like a scalded dog. My twin Benders with six carbs used to hit top straight away speeds of 80 mph.