Shell Spirax S2 ALS 90
Shell Spirax S2 ALS 90 is a high-quality axle oil specifically developed for automotive drivetrain systems equipped with limited slip differentials. Formulated using carefully selected base oils and advanced additive technology, the lubricant provides reliable wear protection, oxidation stability and the correct friction characteristics required for limited slip differential performance. The oil is engineered to deliver consistent lubrication and dependable protection for heavily loaded gear systems operating under demanding conditions.
One of the key advantages of Shell Spirax S2 ALS 90 is its specialised friction-modified formulation designed for limited slip differentials. Limited slip differential systems require precise friction control to ensure smooth torque transfer between wheels while preventing excessive chatter or vibration. The advanced additive system in Shell Spirax S2 ALS 90 provides the correct coefficient of friction needed for these systems, helping maintain smooth differential operation and reliable traction performance across varying driving conditions.
Shell Spirax S2 ALS 90 also provides strong protection against wear and surface damage in heavily loaded gear systems. The formulation incorporates extreme-pressure additives that help protect gear teeth under high load conditions, particularly in hypoid gear sets where sliding contact between gear surfaces can generate significant stress. These additives create a protective film between metal surfaces, reducing metal-to-metal contact and helping prevent scuffing, pitting and excessive wear. This protection helps extend the service life of drivetrain components and maintain reliable axle performance.
Another important benefit of Shell Spirax S2 ALS 90 is its resistance to oxidation and thermal degradation. Automotive drivetrain components can operate under high temperatures and severe mechanical stress, which may accelerate oil degradation. The lubricant’s high-quality base oils and oxidation-resistant additive system help maintain oil stability and prevent the formation of harmful deposits that could affect gear operation. This helps ensure consistent lubrication performance and extended oil life under demanding operating conditions.
Shell Spirax S2 ALS 90 is recommended for a wide range of automotive driveline applications. It is particularly suited for heavy-duty vehicles including buses, construction machinery and passenger cars equipped with limited slip differentials. The oil may also be used in other moderately to heavily loaded gear systems where a friction-modified hypoid gear oil is specified.
The product meets the API GL-5 Limited Slip service classification for axle oils. Physical characteristics include a kinematic viscosity of approximately 155 mm²/s at 40°C and 15 mm²/s at 100°C with a viscosity index of approximately 96. The oil has a density of approximately 909 kg/m³ at 15°C, a flash point of approximately 210°C and a pour point of approximately –18°C, supporting reliable lubrication performance across a wide range of drivetrain operating conditions.
