I was told my Janome should have a drop of oil in the bobbin "wick". I asked the wife of the repair man for Janome at the LQS about oiling and she said when he opens it up he cleans everything then oils every joint in sight! The manual says nothing about oiling. I oil any moving part on my Juki 98 and my Tin Lizzie 18 midarm quilt machine. The vintage machine yahoo groups say to oil where parts move against each other. I can handle an oil bottle, so I oil (and clean) my Janome, Lizzie, and Pfaff machines.