Acetone increases gas mileage !!!

[malibu101]

Actually, the octane rating determines how far the timing can be advanced before spark knock (pre-detonation) occurs. Majority of the gas engines today are designed for 87 octane, and putting the higher octane gas in will do little to improve gas mileage, and any slight gain is more than offset by the higher cost of premium gas. And changing the timing when using premium - well, the computer has more control than you do!

I fully agree with the above.
BUT on the note of higher octane---
The higher the octane the more resistant it is to preignition.
A high compression engine running low octane fuel - The fuel/air mix will likely explode under compression before the spark happens. Such as how a diesel works.
A low compression engine running high octane fuel - High octane fuel is harder to ignite. It will work in a low compression engine with no real ill effects other than than lightning your wallet.

Back to using acetone as an additive.......................

 

[mebedave]

I'm going to try it for myself...Thanks Gary S for the good read

http://pesn.com/2005/03/17/6900069_Acetone/