A heavy duty power transmission, final drive and hydraulic fluid. It has been formulated using high quality base oils and specialised performance additives to meet the exacting requirements of the Caterpillar TO-4 specification. It offers outstanding oxidation stability and improves the frictional and gear wear levels when compared to previous standards. It is suitable for off highway transmissions, drive trains and hydraulic systems and is recommended for Caterpillar, Komatsu and other off road equipment. It is not recommended as a crankcase lubricant.