Bel-Ray's All-In-One Fuel Treatment increases octane for more efficient combustion and more engine power. Cleans fuel lines and injectors to ensure smooth fuel delivery into the combustion chamber. Neutralizes the harmful effects of ethanol on gasoline. The detergency keeps fuel lines and associated fuel components free of build-up and gummy residues. Keeps fuel fresh during storage. Simple application to fuel with no complicated measuring or mixing. 1 oz. treats up to 10 gallons of fuel or 1 oz. for 5 gallons in high performance engines.