Lucas semi-synthetic 2-cycle high-temperature racing oil features advanced-technology TCW3 "low smoke" 2-cycle oil formulated with a special blend of mineral oil, polybutene, and a low-ash additive system. This oil is designed to prevent carbon deposits to the piston rings, skirt, crown, and under-crown areas and prevent exhaust port blocking. It is pre-diluted with a special solvent to facilitate mixing with gasoline at all temperatures.