I went to a Singer dealer to pick up a tube of grease for my FWs and my 15-91. Of course, they were out of it. Their service guy went to the back and brought me a bottle of oil. He said to just put that in the grease pots and that's what they did when they serviced them. I told him, "No thanks", and left. Was he nuts or am I? I've never heard of anyone putting oil in the grease pots. Is this something new, or was he just trying to snow me?