General Information
- When handling refrigerant oil, pay attention to local regulations.
Refrigerant oil mixes with the refrigerant (about 20-40%, depending on compressor type and amount of refrigerant) and circulates constantly in the system, lubricating the moving parts.
Special synthetic refrigerant oils, for example polyalkylene glycol (PAG) oil, are used in conjunction with R134a air conditioning systems. This is necessary as mineral oil, for example, does not mix with R134a. In addition, the materials of the R134a air conditioning system could be corroded as a result of mixture flowing through the refrigerant circuit under pressure at high temperatures or breakdown of the lubricating film in the compressor. Using non-approved oils can cause the HVAC system to malfunction. Only use approved oils.
Refer to the Parts Information.
Type of oil for R134a in motor vehicles: PAG. (Polyalkyleneglycol)
Do not store open containers of refrigerant oil because it attracts moisture.
Always keep oil containers sealed.
Do not use old refrigerant oil over again. For disposing refrigerant oil of unknown origin pay attention to local regulations.
Ester-based oils are only intended for use in large systems at this time, not in passenger vehicle systems.