The fluid comes in contact with the lubricating oil of the compressor;
The oil must have good readability with the refrigerant;
Good readability between the oil and the fluid guarantees the return of the oil to the
Carter of the compressor;
Basic types of oils: Mineral and Synthetics;
Synthetic Oils: Alkylbenzenes; Polyalkylene glycols (PAG) and Polyolster (POE)
