This happened to me too---one shop owner who services Singers told me that Singer did not make the grease any longer and to just use the oil. The other shop owner in our area was quite disturbed that I was told that and ordered a tube for me---this was for my recently purchased featherweight. I emailed Singer and asked them what is the right way to care for my fw and reported the one shop owner. Well, after I left the 2nd shop, he called the first shop, since they know each other, and they got together and instructed each other on what to use on what machine. Now they both learned something and Hopefully I saved a lot of others from heartache. My rule, follow the directions in the manuals unless the manufacturer tells you otherwise.