Folks have their favorites. make sure it is sewing machine oil. 3 in 1 or WD 40 gum up. Some folks like triflow (trifoil?) from bike shops . Your motor needs either oil or grease (Vaseline is often used) depending on how it was made. And BTW your 201 has greasepots below. Wait for others to suggest lube for those.
While you are lubing, get out a little brush and tweezers. tiny bit of thread and lint can lock up a machine.
Manuals are always good to read.