Newbie,
I used to buy the Singer lube at JoAnns and other fabric / sewing shops. Nobody here carries here any more. I don't even know if my LSMG stocks it. I should check. I do know that Sew-Classic and others have it on line so it can be had.
It will probably take me a half tube of the lube to fill the grease cups and gear area on the 15-91 motor I'm working on. Pretty ingenious design. (15-91 and 201-2 use the same motor)
The last couple machines I cleaned up were cleaned with cotton balls and LSA oil. I got it at a military surplus store, it stands for (L)ubricant (S)mall (A)rms and it does a real good job of cleaning. That saves the Tri-Flow and sewing machine oil for actually oiling the machines.
Most any oil can be used for cleaning, but many of them shouldn't be used for actual lubrication.
Joe