Mahle’s PAO 68 oil is practical for workshops, as unlike PAG compressor oils, it’s non-hygroscopic property means it doesn’t absorb water.
Multi-brand workshops often face challenges during the A/C service when it comes to keeping a multitude of different PAG compressor oils in stock. Because of their hygroscopic properties, they soon absorb water when opened or improperly stored and must then be disposed of.
PAO 68 oil from MAHLE is a far more practical and cost-effective solution for workshops. Suitable for many types of compressor, it is also non-hygroscopic and compatible with numerous other lubricants and refrigerants.
When used in combination with PAG oil and refrigerants, it can be mixed with other oils as required, but only to a certain extent. Its molecular structure and density mean that it separates out again when it settles.