Originally Posted by Nate Stanley

Hi JP,
Just a note of caution, I'm told 3 in 1 can gum up a sewing machine eventually.
My aunt had a Necchi commercial machine as part of a drapery business in the early '60s, and she always swore by Hoppe's gun oil.
Her trick was every 2-3 months to lay newspaper under the shafts, flood it with oil while running wide open, then carefully wipe off all the excess.
I did this to my wife's 1927 White when we first got married to de-gum it and it still runs strong. I sewed car upholstery with that machine and it is unstoppable.
--And the older Singers were great machines, but about 20 years ago I heard quality really started to fall. You might have one of the last of the really good ones.