Sta-Bil 360 Marine Fuel Treatment. Helps boat engines run cleaner, leaner, smoother, and stronger. Engineered to combat the effects of harsh marine climates. Recommended for use before every fill-up to preserve fuel, clean the fuel system and prevent corrosion in boat engines. Keeps fuel fresh for up to 12 months. Provides a protective coating on all the metal parts of the entire fuel system and combustion chamber, even when the engine is not running. Provides defense against the harmful effects of ethanol-blended fuels. Clears and prevents harmful gum, varnish, and buildup throughout the combustion chamber and injectors. Helps maximize fuel economy by allowing engines to burn fuel more completely. Features industry-leading water removal properties and specialized PEA fuel system cleaning agents. Compatible with all types of maritime vessels, including boats and jet skis. 1oz treats up to 10 gallons (38 liters) of fuel. Does not contain alcohol. 10 fl. oz.