I've been using a product from 3-in-1 which is a 20wt oil for larger motors. Comes in a blue and white can rather than the familiar red and white and black can of 3-in-1. It smells more like a sewing machine than the way a Teletype machine should smell, but seems to work fine. I haven't been able to find the Slick-50 product around here (but haven't tried very hard).