Shell Spirax S3 AX 85W-140
Shell Spirax S3 AX 85W-140 is a high-performance axle and gear oil developed to provide reliable lubrication and protection for heavily loaded drivetrain systems. Formulated with high-quality base oils and advanced additive technology, the lubricant is designed to deliver excellent wear protection, strong oxidation resistance and extended service life in demanding automotive and off-road applications. The oil is specifically engineered for use in gear and axle systems requiring an SAE 85W-140 viscosity grade and API GL-5 performance level.
One of the key advantages of Shell Spirax S3 AX 85W-140 is its ability to provide outstanding protection against gear wear and surface damage. The advanced extreme-pressure additive system forms a durable lubricating film between metal surfaces under heavy load conditions. This protective film helps prevent metal-to-metal contact in hypoid gears and other drivetrain components, reducing the risk of scoring, pitting and surface fatigue. As a result, the lubricant helps extend gear life and maintain reliable drivetrain performance even in severe operating environments.
Shell Spirax S3 AX 85W-140 also provides excellent resistance to oxidation and thermal degradation. Drivetrain components in commercial vehicles and off-road equipment can operate under high temperatures and mechanical stress that may accelerate lubricant breakdown. The high-quality base oils and long-life additive system help maintain oil stability and resist oxidation, ensuring the lubricant continues to perform effectively throughout extended service intervals. This helps maintain consistent lubrication performance and supports longer oil drain capability where permitted by equipment manufacturers.
Another important benefit of Shell Spirax S3 AX 85W-140 is its versatility across a wide range of drivetrain applications. The lubricant is suitable for many API GL-5 applications requiring SAE 85W-140, SAE 140 or SAE 80W-140 oils. In some cases, it may also be used in applications where SAE 75W-140 fluids are recommended if low temperature performance is not critical. This flexibility allows the oil to be used across multiple vehicle types and equipment categories.
Shell Spirax S3 AX 85W-140 is recommended for use in automotive gearboxes, differentials and hypoid gear sets used in passenger cars, motorcycles, commercial vehicles and off-road machinery including construction and agricultural equipment. It may also be used in ancillary gear systems and some industrial equipment where a high-performance GL-5 gear oil is required. The lubricant meets key industry and OEM specifications including API GL-5 and MIL-L-2105D and is approved for use in MAN 342 Type M1 and ZF TE-ML 07A, 12E, 16D and 21A applications.
Physical characteristics include a kinematic viscosity of approximately 338 mm²/s at 40°C and 29.6 mm²/s at 100°C with a density of approximately 910 kg/m³ at 15°C. The oil has a flash point of approximately 225°C and a pour point of approximately –15°C, supporting reliable lubrication performance across a wide range of heavy-duty drivetrain operating conditions.
