Castrol Classic EP 90 Extreme Pressure API GL 4 is a high viscosity mineral gear oil with antioxidants, anti-wear and high pressure additives to protect against oil oxidation, gear and corrosion damage. Suitable for lubrication of conventional bevel final drives and hypoid axles without major axle misalignment where API GL 4 gear oils are recommended.
Castrol Classic EP 90 Extreme Pressure API GL 4 is due to its high viscosity also suitable for older vehicles where some wear may have already occurred.