MC-4ST 10W-50 is a premium semi synthetic, SAE 10W-50, non friction modified, modern, 4 stroke engine oil. It contains a superior anti wear package of FULL ZINC (exceeding 1200  ppm) for ultimate engine, gearbox & clutch protection. It also features a higher operating temperature viscosity for greater protection in the harshest of on and off road conditions. It meets the requirements of API CH-4/SL and JASO MA.