This product is a 'low smoke' two-cycle oil formulated from a special blend of mineral oil, polybutene and a low ash additive system. Lucas 2 Cycle Racing Oil is specially designed to prevent carbon deposits to the piston rings, skirt, crown and under crown areas and prevents exhaust port blocking. It is prediluted with a special solvent to facilitate mixing with gasolines at all temperatures. Lucas 2 Cycle Racing Oil is recommended for all air and liquid cooled two-stroked engines and lower specific output air-cooled engines functioning under all operating conditions. Meets the requirement for 'low smoke' oils often referred to as 'smokeless' oils. Designed primarily for use in premixes of gasoline and oil up to 50:1