No oil machines need oil! When taken in for cleaning the tech will oil key areas. The gears are embedded with silicone and are self lubricating and oil is not needed for those areas. But if the machine is not used the lubrication will dry up and take a toll on the machine to self lubricate. Never put a no oil machine in the closet and leave it for a long time. If you have a one that hasn't been used in a long time it will need a tiny bit of oil to get going smooth.