Formulated to totally recombine phased out water and ethanol at the bottom of a fuel tank back into the E-10 gasoline. The water will pass through the finest filters with the gasoline and burn through the engine as steam. In the process, the octane phased out with the ethanol, is also replaced back into the fuel. Not for gas without ethanol, use MDR's WATER ZORB. Contains no alcohol or methanol.