What is SAE 80W90?

SAE 80W90 is a type of gear oil that meets the specifications set by the Society of Automotive Engineers (SAE) for viscosity. The "80W" indicates that the oil has a viscosity rating suitable for cold temperatures, while "90" signifies its viscosity at higher temperatures. This oil is commonly used in automotive and industrial applications, particularly for manual transmissions, differentials, and final drives, providing effective lubrication and protection against wear under varying temperature conditions.