Shell Spirax S4 AX 80W-90 Multipurpose Heavy Duty Gear Oil - 400 Pound Drum

This oil is formulated for heavy-duty and conventional differentials in heavy and light duty trucks and passenger cars, manual transmissions, oil-lubricated wheel bearings, and drive-train gears in heavy-duty automotive, trucking, and off-road equipment. It is suited for hypoid, spur, bevel, helical, spiral-bevel, and worm gears found in differentials, transmissions, final drives, and steering mechanisms, as well as industrial gear sets requiring extreme-pressure gear oils.

No — vehicles equipped with limited-slip differentials may require a different lubricant specified by the manufacturer. Shell Spirax LS is one alternative specifically noted for those applications. Check your vehicle manufacturer's recommendation before using this oil in a limited-slip differential.

The 80W-90 multi-viscosity formulation is designed for year-round use across a wide temperature range, so no seasonal oil change is required based on temperature alone.

Yes, this oil is compatible with other automotive gear oils, so topping off an existing fill is possible without flushing the system first.

It protects hypoid gears against wear and scuffing using a sulfur/phosphorus additive system engineered for excellent load carrying capacity under high-speed/shock load, high-speed/low torque, and low-speed/high torque conditions. It also contains additives that inhibit oil oxidation, keep lubricated parts clean, and guard against corrosion, rust, and foaming.

Both are multipurpose extreme-pressure gear lubricants in the same product line, but they differ in viscosity grade. The 80W-90 is also suited for certain heavy-duty manual transmission applications that the 85W-140 does not cover. The correct grade for your equipment depends on your vehicle or equipment manufacturer's specification — consult your owner's manual or Technical Data Sheet to confirm.