Well I tried Acetone in my last tank of gas and it seems to be working great. I am normally about 120 miles to half tank, I drive fast everywhere, and this tank I am at 185 with no change in climate or driving habits. (dance) Not to mention my oil needed to be changed. I picked some up at Walmart for like 12 bucks a gallon and added about 4.3 oz to my tank when I filled up. Car drives smoother and seems to run a little cooler too. My idle is smoother as well. I am happy with the results and will keep doing it. If I could suggest a method to put it in I would get an empty fuel additive container and fill it with that. Do not use plastic it will eat it up in pure form. The article I read on the forum said between 25% & 45% better mileage dep. on driving habits.