GP Hydraulic Oil provides wear, rust and oxidation protection in various mobile and stationary equipment. Prime Guard GP Hydraulic Oil can be used year round and provides protection from wear, rust and oxidation. It is suitable as a general purpose hydraulic oil and for select applications which combine hydraulics, final drives or transmissions. It is not intended to be used in any mobile equipment manufactured after 1974 and is not designed to be used as an engine oil. | Prime Guard Hydraulic Oil | Size 5 gal