Gear Guard EP 90 GL-4

It seems like you're referring to a type of gear oil with the specifications "EP 90 GL-4" and the brand name "Gear Guard." Gear oil is a type of lubricant specifically designed for use in gearboxes, differentials, and other gear applications in vehicles and machinery. Let me provide you with some information about the specifications and usage of this type of gear oil:

EP 90: "EP" stands for Extreme Pressure, indicating that the oil is formulated to handle high-pressure and high-load conditions commonly found in gearboxes and differentials. "90" typically refers to the viscosity grade of the oil, indicating its thickness or resistance to flow at a specific temperature.
GL-4: This is a gear oil classification established by the American Petroleum Institute (API) to indicate the performance level and compatibility of the oil. GL-4 oils are designed for manual transmissions and transaxles, particularly those used in passenger cars and light trucks. GL-4 oils provide adequate protection for gears but do not contain the extreme pressure additives found in GL-5 oils, making them suitable for some synchronized manual transmissions.
Gear Guard: This appears to be the brand name of the gear oil you mentioned. Different manufacturers produce gear oils under various brand names, each with its own formulation and additives.
When using gear oil, it's important to follow the manufacturer's recommendations for your specific vehicle or equipment. Gear oils are designed to provide lubrication, cooling, and protection to gears, ensuring smooth operation and extending the lifespan of the components. Regular maintenance, including checking and changing the gear oil as recommended, is crucial for the optimal performance of your vehicle or machinery.

If you have specific questions about the "Gear Guard EP 90 GL-4" gear oil or if you need more detailed information about its compatibility and usage, it's best to refer to the product's technical data sheet or contact the manufacturer directly.