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There are many industrial oils and greases with high wear resistance and good corrosion protection that are suitable for your gun. The major concern is getting the correct viscosity for the application.

Lubricants are rated using two systems: the Society of Automotive Engineers (SAE), and the International Standards Organization (ISO.) Motor oils generally carry SAE classifications, while industrial oils are usually rated according to the ISO scale. They are not equivalent.

For those familiar with automotive oils, a 30w motor oil is roughly an ISO 100 equivalent, while a 10w oil would be about 25 on the ISO chart.

Greases are rated by the National Lubricating Grease Institute, and they issue an NLGI grade. A typical automotive bearing grease is NLGI #2 and has the consistency of peanut butter. A grease rated as NLGI #0 is just barely solid at room temperature, like mustard, while a #00 is semi-fluid – think very finely ground applesauce.

For general gun use, I’ve found an oil in the ISO 30 to ISO 50 range works pretty well. Look for an oil with anti-oxidation and anti-corrosion additives, which address the two major issues with gun oils: they prevent rust and they’re able to sit for long periods of time without thickening or turning waxy.