Originally Posted by
KenmoreGal2
Because I wanted it today. I'm in the middle of a project. I was under the impression it was really bad that my grease was so old and that if I continued to sew with it I may damage the gears.
Old grease is well, old. There may be crud, lint and dirt in it. All of which can damage gears. Any old grease is best removed and replaced with new. Personally I only use Triflow so won't guess about the efficacy of other products not made for sewing machines.