Shell Spirax S3 ALS 85W-90
Shell Spirax S3 ALS 85W-90 is a high-performance axle oil developed specifically for automotive drivetrain systems equipped with limited slip differentials. Formulated using high-quality base oils and advanced additive technology, the lubricant delivers reliable wear protection, excellent friction control and strong oxidation stability. The oil is engineered to provide consistent lubrication performance and dependable component protection for heavily loaded axle systems operating under demanding conditions.
One of the key advantages of Shell Spirax S3 ALS 85W-90 is its specialised friction-modified formulation designed for limited slip differentials. Limited slip systems require precise friction characteristics to ensure controlled torque transfer between wheels while preventing vibration or chatter during operation. The additive system used in this lubricant provides the required coefficient of friction to ensure smooth and efficient differential performance across a range of driving conditions.
Shell Spirax S3 ALS 85W-90 also provides excellent protection against wear in heavily loaded gear systems. The lubricant contains extreme-pressure additives that form a protective film between metal surfaces, helping prevent metal-to-metal contact under high load conditions. This protection helps reduce the risk of scuffing, pitting and excessive wear in hypoid gears and other drivetrain components, contributing to longer equipment life and improved reliability.
Another important benefit of Shell Spirax S3 ALS 85W-90 is its strong oxidation and thermal stability. Automotive axle systems can operate under high temperatures and heavy loads, which may accelerate lubricant degradation. The high-quality base oils and advanced additive system help resist oxidation and maintain oil stability during extended service intervals. This helps prevent deposit formation and ensures consistent lubrication performance throughout the oil service life.
Shell Spirax S3 ALS 85W-90 also offers improved performance compared with earlier formulations such as Shell Spirax S2 ALS 80W-90. The lubricant provides enhanced protection that meets the performance requirements of MIL-L-2105D and offers reliable lubrication for modern drivetrain systems requiring limited slip functionality. In addition, the product carries OEM approval from ZF for use in differential and axle units.
The lubricant is recommended for automotive driveline applications including heavy-duty vehicles, construction machinery, buses and passenger cars equipped with limited slip differentials. It may also be used in other moderately to heavily loaded gear systems where a friction-modified hypoid gear oil is specified. The product is particularly suitable for ZF differential units and applications such as Liebherr equipment where a limited slip lubricant is required. Physical characteristics include a kinematic viscosity of approximately 16.5 mm²/s at 100°C with a viscosity index of approximately 101 and a pour point of approximately –36°C, supporting reliable lubrication performance across a wide range of operating conditions.
