John speaks about fuel additives, specifically acetone. Improve fuel mileage and engine performance when added under the following suggested guidelines (less is more): For gasoline engines, 1-3 ounces of pure acetone PER 10 gallons of gasoline. For diesel engines: 1-2 ounces of pure acetone PER 10 gallons of diesel.
<a href="http://pesn.com/2005/03/17/6900069_Acetone">www.pesn.com/2006/03/17/6900069_Acetone</a>