In the process of restoring a 9A and just cleaned up and painted the 1/2 HP single phase GE motor. Pretty sure it's original, or at least vintage. Haven't powered it up yet, so I'm not even sure it runs. It has oil cups on the end bearings. What type oil should be used for this? From what I've read, it seems oiling is only needed once or twice a year? Is this correct? Thanks!