Shell Spirax S4 AX 80W 90 Multipurpose Heavy Duty Gear Oil 400 Pound Drum featured_product which means it can be which means it can be used as a substitute for older formulations of oil Spirax S4 CX meets the high performance requirements of modern transmission Protects hypoid gears against wear and scuffing Multi viscosity for year round use over wide temperature range Contains a sulfur phosphorus additive system for excellent load carrying capacity Contains additives to inhibit oil oxidation and keep lubricated parts clean Contains inhibitors to protect against corrosion high speed low torque and low speed high torque conditions