I have a Pfaff 362 I bought new approx 48 years ago. I took it into a shop to be gone over although it was in perfect shape and worked just fine about eight years ago. It cost $80, it was all scratched up, covered with black grease and no longer looked new when I picked it up, and didn't work any better. It stopped working 6 months ago (plan to take it in and have it repaired) and bought a Janome 9700 not quite a year ago and I was told it should be taken into the shop once a year to be gone over and oiled. The Phaff had instruction as to how to oil etc. the Janome didn't have any instructions oil included. I called awhile back to have the Janome gone over and was told it would be 3 weeks before it could be done, not only that but I would have to leave it there that long.
I have not taken it in.
tuni