Definitely call the dealer, but my Bernina has a counter and it will tell me it's time to oil after a certain number of stitches, regardless of whether I've been doing it consistently. It doesn't know that I've been oiling, and simply pops up the message every x stitches (or maybe hours). So I just use that as a gentle reminder, and dismiss the message (unless I missed oiling last time I changed the bobbin).