I know there is a manual online at the Singer website. I have one for my 99, and there is a diagram for the oil and where to put the grease for the motor...no oil in the motor, only grease...There are holes in the top. I read somewhere that if there is a hole that is not threaded...meaning it's not for a screw...put oil in there. There are maybe 3-4 in the top, two in the base, the bobbin winder, one by the hand wheel, underneath, just oil everything that moves, metal against metal. Let it soak in, wipe off the excess, move the hand wheel as you go to work it in. If you can't find anything, send me a message and I can copy the page from the manual.
Barb