[KevinM]

I tried it with my last tank. I had about 60 miles on the tank (of Chevron gas) when I added the acetone. I picked up a 1 gallon gas container, filled it up with gas, added approx. 2 oz of acetone, shook it up and added it to the tank. I did a combination highway and city driving on the tank, and the gas mileage worked out to be close to 21mpg. This is slightly better than usual, but could be due to the Chevron gas. I put 3 oz in my current tank (measured) but am using Exxon gas. I will report the findings again.