what is pag oil
We get this question often. The fact of the matter is unless you are changing out the compressor or another component in your A/C you probably will never have to worry with this. That being said letâs take a look at PAG and ESTER oils.PAG is actually an acronym for Polyalkylene Glycol, and it is a synthetic oil used in A/C systems to lubricate the compressor. Most all newer model cars use PAG as the lubricant in the A/C system.When people refer to PAG oil they typically refer to it in the following terms: PAG 46, PAG 100, or PAG 150.ost all newer model cars use PAG as the lubricant in the A/C system. When people refer to PAG oil they typically refer to it in the following terms: PAG 46, PAG 100, or PAG 150.