You have the instructions for oiling the machine? if not get them. Also, see if there are illustrations of the parts to oil. I would study all the oiling parts and oil the piss out of it. Make sure the pressure on the feet is not too high.
I am always amazed on how many sewers do not get the operations manual, parts manual and if available, the mechanics or engineering manual. These are critical if you are sewing on a a sewing machine. I have preached this to so may sewers over the years. You need the manuals!!. Not a question of if but WHEN. I am not saying you are one of the them DBZ456. But this info is essential if you what to learn your machine. Really helps on locating the oiling points.