I have a 22 year old singer 20 stitch. Honestly - my DH just open s the top and the bottom and oils everything then we let it sit on newspaper because some will drip out. the next day he puts it back together. He just oiled mine and she is running smoothly. he actually paints the oil in there with a small paint brush. I don't know if it is the correct thing to do or not , but , so far, it has worked fine.