STP Premium 2-Cycle Fuel & Oil Pre-Mix with Fuel Stabilizer 50:1 is a ready-to-use, pre-mixed ethanol-free formula for air cooled 2-cycle engines that meets JASO FD oil certification specifications* to help maintain maximum engine performance. The premium ethanol-free formula is engineered with synthetic blend oil and anti-wear technology to help reduce friction and keep small engines running cooler. Detergents helps keep the fuel system clean and smoke exhaust low. Plus, it contains fuel stabilizer to keep fuel fresh during infrequent use. Can be used with chainsaws, string trimmers, leaf blowers, 2-cycle generators and other 50:1 2-cycle gasoline powered small engines (refer to owner?s manual).