I am surprised at the comment above not to oil a BERNINA machine. The bobbin race area needs to have a drop of oil every once in a while-when it has a good cleaning. I do this after about five bobbin loads. My B530 even has a video or how to do it on the computer screen under maintenance. I had to replace a part in the bobbin race area because of abrasion because I had not oiled it- this was on an 1130. I learned my lesson. I think the information in all of these manuals mentioned means not to randomly oil all the rest of the machine. Read manuals carefully and follow all maintenance suggestions.