B3C Fuel Solutions Ethanol Shield Gas Treatment And Stabilizer protects your entire fuel system from the harmful effects of ethanol-blended fuel while cleaning varnish and carbon deposits from the fuel tank to the tailpipe. It is i for use in cleaning and removing carbon and water, as well as for preventive maintenance on infrequently run engines such as those in power equipment and recreational vehicles. This treatment acts as a fuel preservative by adding antioxidants to the fuel, counteracting the oxygen-rich nature of ethanol-blended fuel (E-10). Additionally, it functions as a fuel catalyst by keeping hydrocarbon chains short, which helps prevent premature fuel decomposition. Registered with the EPA, Ethanol Shield is by B3C Fuel Solutions for use with nonroad gasoline engines. The product comes in a 4 oz size and treats up to 40 gallons of fuel. Model Number: 1-004-12C