Lucas Safeguard Ethanol Fuel Conditioner with Stabilizers was developed to specifically address issues associated with using ethanol based fuels. Completely soluble in all ethanol fuels and will not harm filters. Contains effective additives to prevent rust and corrosion. Cleans injectors, valve seats, combustion chambers, and other critical fuel components. Stabilizes fuel, prevents varnish and gum formation in ethanol and gasoline. Combats deposits and protects your engine oil lubricants from the harmful effects of alcohol combustion. Recommended for use in automobile and marine applications. Not recommended for diesel applications.