Castrol Classic EP 90 is an oil perfectly suited to the most extreme pressures. Thanks to its EP additive, it is able to remain effective against the strongest friction pressures and provides excellent protection. Car manufacturers especially recommend it for the maintenance and lubrication of spiral-conical gears as well as for most hypoid final reductions (provided they require the use of GL-4 API oil). Versatile, this product offers a very good resistance to oxidation and excellent anti-moss properties.