Sta-Bil Fuel Stabilizer and Performance Improver Keeps Stored Fuel Fresh provide Quick & Easy Starts. This 8 FL OZ container treats 20 gallons keeping fuel fresh for 12 months. Plus it contains a water remover to prevent corrosion and a fuel injector & carburetor cleaner to restore power. Ensures quick start in all 2 & 4 cycle engines. Use in gas, gasohol, gas/oil mixtures, oxygenated gas & diesel fuel. 1 ounce treats 2.5 gallons.