Heres another site I found on the issue. Evidently it is possible if your car is older (like min), there is a slight chance it could destroy some of the fuel parts, but if the car was made for gasoline, it should run acetone just fine. Also be sure to use 100% acetone, and not mixed. Like I said here is another link with more info. Also rule of thumb is usually only 1oz. of acetone per 10 gallons of gas. Cant wait to test it myself.
http://www.pureenergysystems.com/new...00069_Acetone/