I oiled my walking foot once. Big mistake. It dripped dark oil onto my project. I oiled it because a good friend went to a Juki seminar and the expert said to oil it. Maybe if I had oiled it all along, it would not have a build up of I think are filings like graphite and I would not have had the problem. But mine never squeaked like some of y'all have said your's squeaks. So if you do oil it, be sure not to put a precious project under it when you use it the next few times.