Helps maintain engine efficiency! 1 bottle = 1 use. Fights deposit buildup & engine friction! Treats up to 21 gallons. America's leading fuel additive maker! Use regularly when you fill up. STP Fuel Injector & Carburetor Treatment helps: maintain optimum engine efficiency; fight friction on piston rings/cylinder walls; save gas by keeping injectors and carburetors clean. STP does not manufacture any private label products. Made in the USA.
Always refer to the actual package for the most accurate information