I was told that the the best oil, so you stated, for R134a is PAG oil. I would like very much to use it on R134A. But I was also told that if it is for conversion from R12, PAG oil will attack the compressor seal designed for R12 causing leakage later. Ester oil is okay but it is not as good a lubricant as PAG or mineral oil.

Correct me if I am wrong.

David