[womacje]

These devices claim to improve efficiency.
How inefficient is a gas combustion engine?
liquid fuel sucks at combustion, surface tension, beading up on cylinder and intake port walls

I have used acetone in a 4oz per 10gal situation and seen a 7% increase in economy, 2mpg.

I believe there is room to improve the effciency of our combustion engine, but I don't have hard factual data other than my acetone experience for the past two years.