I cleaned up a Kenmore 117.959 today. It's a 1948 straight stitcher. I used Tri-Flo oil on metal parts and Singer lube in the motor grease cups. The grease cups had hard dry gunk in them and it had a loud squeak when it ran. After running a couple minutes, it got smooth and much quieter. I love bringing an old gal back to life! I do use Tri-Flo grease on gears but this particular machine doesn't have any.