What gearbox oil do you put in a Twin Disc MG-507?

For a Twin Disc MG-507 gearbox, it is recommended to use a high-quality marine gear oil, typically with a viscosity rating of SAE 90 or 80W-90. It’s important to select an oil that meets API GL-4 or GL-5 specifications to ensure proper lubrication and protection. Always refer to the manufacturer's guidelines for specific recommendations regarding oil type and change intervals.