Replaced the AC and the receiver dryer. No idea about oil; the indy charged the unit up and it cooled like new for years. Then it ran out of freon; over what period of time I do not remember. Waited some four years then...with the forum member, we put the gauges on and installed freon until the pressure came up to speed. We were running the AC (as I remember) on full blast and max cool and I was holding it at a fast idle. It just did not get very cool and we stopped adding freon per the gauges. Never added more oil after I put in the new AC in about 2000.

No dog.