Gallon. Treats up to: 640 Gallons. Engineered to combat the effects of harsh marine climates. Provides defense against the harmful effects of ethanol-blended fuels. Cleans the fuel system of watersport engines to ensure it operates at peak performance. Keeps fuel fresh for up to 12 months. Compatible with all types of maritime vessels, including boats and jet skis. Specialized PEA Fuel System cleaning agents.