The feed dogs on my machine were going thump, thump, thump everytime I sewed. So I was going to take it to a repair man and I read this quilting site and couldn't remember if I ever oiled my machine. I love my machine and haven't wanted to give it up. It was purchased new in the early '70. Sooooo I brush off the feed dogs, oiled the little holes that was marked red, guess what! It purrs. Thanks gals. The money I saved on a repair guy I can buy fabric. Yeah!