Answer
Sep 09, 2024 - 12:47 PM
PAG oil (Polyalkylene Glycol) and Ester oil are both lubricants used in automotive air conditioning systems, but they have different chemical compositions and applications. PAG oil is typically used in R-134a systems due to its compatibility with the refrigerant, while Ester oil is more versatile and can be used in systems with various refrigerants, including those retrofitted from R-12 to R-134a. Additionally, Ester oil is more hygroscopic than PAG oil, meaning it absorbs moisture more readily.
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