Refrigerant Oil Characteristics
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 REFRIGERANT R134A CAPACITIES, REFRIGERANT OIL AND APPROVED REFRIGERANT OILS .
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.
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 oil. Refer to the Parts Information. For the correct capacities. Refer to REFRIGERANT R134A CAPACITIES, REFRIGERANT OIL AND APPROVED REFRIGERANT OILS .
Important Information
Refrigerant oil attracts moisture. Close any opened containers immediately after use to prevent moisture from entering.
The specification about the usability of the refrigerant oil is given on the bottle the refrigerant oil is delivered in.
This time specification does not need to be observed when the delivered bottle is tightly sealed.
Refrigerant oil from a delivered bottle that is tightly sealed can also be used after the time specified on the delivered bottle.