Which oil company do you work for?????????? Acetone will not harm any of the components of your engine including the elasterometric seals when used in small concentrations of 3 or less oz. per every 10 gallons of fuel. The reason that it's not in the fuel already is because the oil companies would lose profits. Why do you think that they are adding ethanol to our fuel now!!!!! So we have 10% less fuel mileage and they can sell us more fuel for rediculously outrageous prices. As far as unproven, I have been adding a mixture of acetone and a few other solvents to my fuel for 4 years now and have not had any problems directly related to the additive. Oh Yeah, did I mention that I'm getting 36.5 miles per gallon from a general motors 5.3L V8 in a 4x4 truck??? Sounds like it's been proven to me......