Get rid of carbon and gum deposits and keep them gone with Star brite Star Tron Ring Clean+ Motor Treatment. Its proprietary enzyme package in a formula of the latest deposit-control technology removes existing deposits and helps to prevent the formation of new buildup. The outcome is improved engine performance, better mileage, and cleaner carburetors, fuel injectors, intake ports, and combustion chambers. Star brite Star Tron Ring Clean+ works with all gas engines and is ideal for removing deposits from ethanol-blended fuel.Made in USA. Size:16 oz. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Motor Treatment.