contain MTBE, ETBE, ethanol or methanol?
No. Fuel Enhancer does not contain any of these octane boosters. Fuel Enhancer has an oxygenated polar compound that improves the combustion process in gasoline and diesel engines. In gasoline engines, it reduces combustion chamber deposits (CCD) thereby reducing the octane number required (ONR) by the engine. In diesel engines, it reduces the ignition delay and improves the Cetane number of diesel fuel. In both gasoline and diesel engines improved combustion results in better fuel economy and lower emissions.