Refrigerant Oil: Notes

WARNING: This page is about a different car, the 2023 Audi SQ8, 2023 Audi RS Q8, and 2023 Audi Q8. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION:

When handling refrigerant oil, pay attention to local regulations. Refer to Audi ServiceNet, HSO Environmental Protection (or Volkswagen ServiceNet, Handbooks, Service Handbook; Environmental Protection).

Refrigerant oil mixes with the refrigerant (approximately 20-40%, depending on compressor type and amount of refrigerant), circulates continuously in the circuit and lubricates the moving parts.

Special synthetic refrigerant oils, for example polyalkylene glycol (PAG) oil, are used in conjunction with R134a A/C systems. This is necessary as mineral oil, for example, does not mix with R134a. In addition, the materials of the R134a A/C system could be affected if the mixture flows through the refrigerant circuit under pressure at high temperatures or the lubricating film in the A/C compressor tears. Using non-approved oils can cause the A/C system to malfunction. Only use approved oils.

Refer to the Parts Information.

Type of oil for R134a in motor vehicles: PAG. (Polyalkylene glycol)

NOTE:

Do not store open containers of refrigerant oil because it attracts moisture.

Always keep oil containers sealed.

Do not use used refrigerant oil. Used oil of an unknown origin must be disposed of according to local regulations. Refer to Audi ServiceNet, HSO Environmental Protection (or Volkswagen ServiceNet, Handbooks, Service Handbook; Environmental Protection).

Ester-based oils are only intended for use in large systems at this time, not in motor vehicle A/C systems.