Let's just assume for a moment that the acetone would not damage anything. Now, how much does acetone cost? Is it CHEAPER than gasoline or diesel fuel? I have no idea, but my guess is that it is indeed more expensive.

If it is more expensive, and you add it to increase fuel mileage, what have you gained? It would probably cost MORE per mile.

Now remove the assumption and it will really cost some bucks after the repair or parts bill.

Have a great day,