AC O-ring Lube Type?

FIY...Before I retired I worked for a major AC remanufacture of compressors and my 1994 Duster was one of the companies "test mules" . One of our tests was to install a reman compressor on the Duster (134A system) using mineral oil, not the OEM PAG oil. Since the mineral oil would not mix with the 134A refrigerant it all remained in the compressor, where it belongs. The compressor is the only moving part in the AC system so that is where the oil needs to be. That compressor was nice and quiet as well as worked perfectly for as long as I owned the car. I sold it in 2005 still blowing ice cold air. All O-rings and seals need to be lubed when installed.