[Dangerous Dan]

Acetone in your tank will probably do more harm than good. We use it and Toluene in our laboratory because they are both very good solvents. We have to be careful because it is harmful to breathe too much of the fumes and they attack and degrade paint, plastics, rubber and just about anything else that they encounter. Our glassware is not affect by them, however.

Components like alcohol increase the octane because they add an OH group to the mixture. The "O" is an oxygen molecule that helps to burn the fuel better. This is less expensive than adding higer octane crude components, because it is difficult to make these components, therefore more costly.

I very much doubt that you will find Acetone, Toluene, MTBE or any other unusual component in gasoline. We are not allowed to add these components to the gasoline because they are less expensive and we run tests for these and other contaminants every step of the refining process. Ethanol is the exception and we have to accurately state when it is in the gasoline and the amount that we add is carefully regulated.

I suggest that you look up the MSDS(Material Safety Data Sheet) of anything that you add to your fuel so that you don't endanger your or your family's health.