For the first time, science has truly unlocked the secret of mileage, power, longevity, and smog reduction - all in the form of one small and inexpensive tablet that works in gasoline and diesel engines. MILEAGE: Ongoing regular use of Ferox Fuel Tabs will result in reduced fuel consumption (or improved mileage) of up to 20%. POWER: Within the first 4000 miles of running a new motor, hard carbon deposits have begun to build up. Ferox Fuel Tabs remove these deposits and prevent them from forming regardless of how old or new your engine is. LONGEVITY: The elimination of hard carbon deposits results in far greater engine life and far fewer mechanical repairs. SMOG REDUCTION: Reduce hard carbon deposits and obtain a more complete burn resulting in fewer emissions.