I would keep the singer. I have a 401 slant o matic, it is my favorite machine, sews beautifully and will sew thru anything with no problem. I don't have any cams for it, I find all I need are the built in stitches it has. It is on loan to my mom right now, she also loves it and wants to keep it instead of replacing her broken machine so I am looking to buy another one for myself. BTW, grease is for the moving parts, NOT THE MOTOR.