Westway Oils | Marine Lubricants Marine Gear Oil SAE 90 High-Performance | API GL-5 | Outboard & Sterndrive The Westway Oils Marine Gear Oil SAE 90 is a high-performance, extreme-pressure (EP) lubricant specifically formulated for the demanding conditions of marine gearcases. This premium gear oil is designed to provide robust protection for outboard lower units and sterndrive systems, ensuring smooth operation and extended component life in both freshwater and saltwater environments. Engineered to meet API GL-5 specifications, this SAE 90 gear oil offers superior protection against wear, corrosion, and pitting, particularly for hypoid gears operating under high-load and high-speed conditions. Its advanced additive package helps maintain lubrication integrity even when exposed to water, crucial for marine applications. ▶ Buyer Note: Always consult your engine or drive unit's owner's manual to confirm the correct viscosity grade (SAE 90, 80W-90) and API specification (GL-5) before purchase and application. Key Features ▶ API GL-5 Rated: Provides robust extreme pressure protection for hypoid gears. ▶ SAE 90 Viscosity: Ensures optimal film strength at operating temperatures. ▶ Water Resistance: Formulated to maintain lubrication properties even with water ingress. ▶ Anti-Corrosion Additives: Protects internal components from rust and corrosion in marine environments. ▶ Seal Compatibility: Designed to be compatible with common marine gearcase seals to prevent leaks. ▶ Shear Stability: Maintains viscosity under severe operating conditions. Technical Specifications Viscosity Grade SAE 90 API Classification GL-5 Product Type Marine Gear Oil Manufacturer Westway Oils Typical Applications Application Area Description Outboard Lower Units Suitable for the lower unit gearcases of most major outboard motor brands requiring SAE 90 or 80W-90 GL-5 gear oil. Sterndrive Systems Ideal for sterndrive gearcases, including Alpha, Bravo, SX, and DP units, where GL-5 protection is specified. High-Load Marine Gears Provides excellent protection for marine gears subjected to heavy loads, high torque, and continuous operation. Compatibility & Cross Reference This Westway Oils Marine Gear Oil SAE 90 is formulated to meet or exceed the performance requirements of many leading marine engine manufacturers. It serves as a reliable alternative for OEM gear lubricants specifying an SAE 90 or 80W-90 GL-5 oil. Make/System Typical Application Notes Mercury / Mariner Outboards (75HP+), Mercruiser Alpha & Bravo Sterndrives Replaces High Performance Gear Lube (GL-5) Yamaha / Suzuki / Honda Outboard Lower Units Meets manufacturer GL-5 requirements Volvo Penta SX, DP Sterndrives Direct replacement for SAE 90 GL-5 Johnson / Evinrude Outboard Gearcases Excluding electric shift models OEM Cross Reference (Partial) Mercury / Quicksilver 92-858064K01, 92-858058K01 Yamaha Yamalube ACC-GEARL-UB-QT Sierra Marine 18-9600, 18-9650 Suzuki 99000-22B21-000 Common Questions Is this a genuine original part? This is a premium quality Westway Oils lubricant, distributed by Solarika. It is manufactured to meet or exceed API GL-5 standards for high-performance marine gearcases, offering a reliable alternative to OEM products. How do I know if it is compatible with my marine engine? If your engine or drive unit's owner's manual specifies an SAE 90, 80W-90, or API GL-5 gear lubricant for your lower unit or sterndrive, this oil is generally suitable. Always cross-reference with your manufacturer's recommendations. Can this SAE 90 oil be used where 80W-90 is specified? Yes, in many marine gear applications, SAE 90 single-grade gear oil provides a similar high-temperature viscosity to an 80W-90 multi-grade oil. It is often considered suitable for systems that specify 80W-90 GL-5, particularly in warmer climates or during continuous high-load operation. What are the benefits of using a GL-5 rated gear oil? GL-5 rated gear oils contain a higher concentration of extreme pressure (EP) additives compared to GL-4 oils. This provides superior protection for hypoid gears, which are common in marine lower units and sterndrives, especially under conditions of high sliding and shock loads. Installation Notes Changing marine gear oil is a routine maintenance task. Ensure the engine or drive unit is off and cooled. Locate the drain and fill plugs on the lower unit or sterndrive. Always use a suitable gear oil pump for filling to ensure proper lubrication and prevent air pockets. Refer to your specific marine engine or drive unit's service manual for detailed instructions, fill capacities, and recommended service intervals. Before You Buy To ensure you purchase the correct product, please verify the required viscosity grade (e.g., SAE 90, 80W-90) and API specification (e.g., GL-5) for your marine engine's lower unit or sterndrive. This information is typically found in your owner's manual or service guide. While this oil is broadly compatible, specific manufacturer requirements can vary. Important: Always verify your original equipment manufacturer (OEM) requirements against the product specifications before purchasing. Product distributed by Solarika.co.uk.
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