STIHL Moto4™ utilizes an ethanol-free formula that minimizes the buildup of moisture, allowing the fuel to stay fresh longer — up to two years after the container is opened — than alternative fuel options containing ethanol. With a minimum octane range of 93, this premium fuel is specifically formulated by STIHL for use in 4-stroke products, to consistently deliver excellent engine performance. Visit our dealership to experience STIHL fuel.