Any of our carburetor cleaners (whether fuel additives or aerosol cleaners) may be used on small engines like lawn mowers. While there is unfortunately no good solution to long-term protection against ethanol-based gasoline, i.e. “E10,” Berryman Total Fuel Stabilizer (part #s 0408 and 0416) contains high-performance metal deactivators, antioxidants, and corrosion inhibitors in order to offer excellent protection against fuel spoilage and engine/carburetor damage.