I recently posted a thread asking if anyone know if I could oil my Singer Athena. No answer so am asking again. I have always been told NOT TO OIL but I only use this machine occasionally and I do think that it requires some lubrication. However, having been told not to OIL I am hesitating to do so. I do not want to pay for an overhaul as the machine does not warrant that. Anyone have any thoughts about this?