The Fitch® Fuel Catalyst reformulates gasoline, diesel, fuel oil, propane and natural gas causing the reformulated fuels to produce more energy during combustion than these fuels otherwise would. It is a true catalyst which by definition causes one or more chemical reactions but does not participate in them. Because it doesn’t participate in the reaction, unlike additives, it is not consumed in the reaction and thus lasts for years after initial installation. The Fitch Fuel Catalyst also has no moving parts and is thus maintenance free.