I tested the acetone in my 02 dakota this summer. The test lasted for 3 weeks, I always added the correct amont of acetone per the amont of new fuel. I noticed zero increaes in mileage and no increases in performance. I have been checking the MPG on the dakota since Feb 05. The only increases I have noticed was after the following.
Tune up- plugs,wires,air cleaner, ect.
Tires - narrower tires,up the psi
super chip- super chip micro tuner.^ 2.5mpg
o2 sensor- change don't wait till it goes bad.
These are my results, total increases about 4.5-5 MPG