Carlube EP75w90 Fully Synthetic Gear oil is specially designed for manual ZF gearboxes, but can also be used in synchromesh gearboxes & final drive units. Carlube Gear Oils are a high perfromance range developed to keep vehicles fully lubricated at extreme pressures & temperatures. Blended from refined basestocks and additives, Carlube Gear Oils are designed to give the required frictional properties, oxidation resistance & anti-wear performance.