Refrigerant Oil Characteristics

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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 APPROVED REFRIGERANT OILS AND CAPACITIES .

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:

Refrigerant oil, because of its chemical properties, must not be disposed of with engine oils or transmission oils. For disposing refrigerant oil of unknown origin pay attention to local regulations.

Only the oil approved for the A/C compressor may be used in refrigerant circuits with refrigerant R134a. For the correct capacities, refer to APPROVED REFRIGERANT OILS AND CAPACITIES .