Motorcycle 4 Stroke V-Twin PAO and Ester 20W-50 is a premium 100% PAO and Ester, full synthetic, SAE 20W-50, non-friction modified 4-stroke engine oil. It contains a superior anti wear package of FULL ZINC (exceeding 1800 ppm levels) for ultimate engine, gearbox and clutch protection against wear, corrosion, oil oxidation, piston deposits and sludge under all conditions.