| The refrigeration system oil mixes with the refrigerant gas (between 20 and 40% depending on the type of compressor and on the amount of refrigerant gas), and is always present in the loop, lubricating the moving parts. |
| Air conditioning systems that use R134a operate with a special synthetic oil, for example, polyalkylene glycol oil (PAG). This is required because mineral oils, for example, do not mix with R134a. Furthermore, materials used in air conditioning with R134a can be affected if the mix is subjected to high pressures and temperatures inside the refrigerant gas loop, or if the lubricant film is removed from the compressor. The use of unauthorized oils can damage the air conditioning, thus only duly certified oils should be used. |
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| Do not store refrigeration system oils in open containers; as these oils are hygroscopic (they attract water). |
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| Always store the oil in closed, airtight containers. |
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| Do not reuse oil. Due to its chemical properties, refrigeration system oil should not be discarded together with engine oil or transmission oil, and must be disposed of as oil of unknown origin. See manuals and procedures for disposal of chemical/contaminated products, in compliance with current environmental regulations on refrigerant gas from air conditioning systems / refrigerant gas oils. |
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