Yeah. He said it he actually feels like the car is a little more "peppy." lol He's been doing for about a month and hes saved 25 bucks. The formula is 3-4 oz of acetone per 10 gallons and if anybody has ever tried this or bought acetone, you know that acetone is like 3 bucks. He's not using like nail polish remover, he's using the pure acetone like the stuff you can get at home depot (people use it as paint thinner).