During the recent visit to Miriam and Phil's home, Miriam gave me a bottle of T-F to try. I cleaned a machine of all the gunk and lubed it with T-F and it was great as a lub. Now I am working on an old Standard and will see how well it will loosen the hard oil deposit and will let you know. If your oiling a clean machine that is used often so far can't tell the diff between sewing machine oil and the T-F. Now remember all my machines are used regularly so no standing oil on them.