Maintenance 109 Oil Quality CAUTION Use only the specified type of single weight oils. DO NOT use multigrade oils or EP gear oils (for example axle lube oil such as GL-5 gear oils) as they may damage components. Monograde motor oils or transmission oil type API GL-1 are recommended for transmissions. Choose the correct viscosity for the outside temperature the vehicle will be operated in. See page 142 for the beginning of viscosity charts. If using synthetic base oils, the change interval goes up to 250,000 miles (400,000 km), or 500,000 miles (800,000 km) if using the manufacturer approved brand of oil filled from the factory.
Oil Filter Oil filters should be changed at the same time as the oil. Also, make sure that magnetic bottom plugs are cleaned before installing. Change the filters in accordance with the manufacturer’s Operator’s Manual.