Refrigerant Oil Characteristics

WARNING: This page is about a different car, the 2011 Volkswagen CC, 2010 Volkswagen CC, and 2009 Volkswagen CC. However, it is still accessible from the selected car via links, so may be relevant.

The most important properties are a high degree of solubility with refrigerant, good lubricity, absence of acid and minimal water content. Only certain oils are permitted. For a list of approved refrigerant oils and capacities, refer to Maintenance, Diagnosis .

PAG oils, which are appropriate for refrigerant R134a, are highly hygroscopic and do not mix with other oils. Opened containers should therefore be closed again immediately to prevent ingress of moisture. Moisture and acids promote aging of refrigerant oil, causing it to become dark and viscous as well as corrosive towards metals.

NOTE:

Only use oils approved for the A/C compressor in refrigerant circuits with refrigerant R134a. For capacities, refer to Maintenance, Diagnosis .

Dispose of old oil. Refer to Volkswagen-Service Net, Handbook, Handbook Service Germany; 15. Environment Protection; further with Environmental Protection; 7 emission protection; refrigerant oil.