Bernina produces two oils for sewing machines and one for overlockers. It is essential to use the correct oil for your machine model.
The hook type dictates the type of oil you need the traditional CB models require (no 10). The rotary hook, Bernina hook and longarm machines all require a lighter (no 6) oil as they run faster. The overlockers require (OY 100K).

Never use DIY store or vehicle lubricants or spray lubricants – these can damage your machine.