What Oil Should I Use? We recommend using 30-weight, non-detergent oil (ISO 32 equivalent) for the headstock. For Zerk fittings, use ISO 68 equivalent way oil. These oils are commonly available at most auto parts or hardware stores if you prefer to purchase them locally. Related articles What is your return policy and how do I start a return? How do I refill the gearbox on my planer properly? What forms of payment do you accept? Does the Headstock Come with Oil? Didn’t find what you were after?