Comma 2 Stroke Racing 2T Fully Synthetic Ester Motorcycle Engine Oil 1 Litre. This fully synthetic, ester-based oil is designed for 2-stroke engines, offering high performance and engine protection. Suitable for motorcycles, scooters, and mopeds that require an oil that readily mixes with fuel. It provides low smoke and is ideal for motorsport and competition use. Comma Oil & Chemicals Ltd is a world-class manufacturer and supplier of automotive lubricants, chemicals, and ancillaries.