This depends on the machine you have because if the manual doesn’t contain anything about oiling, then your machine has probably been pre-lubricated at the factory.nnThis means there is no need to oil or lubricate it.nnHowever, if it does say that you need to oil it, then it's best to do so once a week if you are a daily user.nnOnce a month is enough if you use it weekly, and once every three months if used once a month.