What type of oil is most commonly used with CFC refrigerants?

The most commonly used oil with CFC refrigerants is mineral oil. This selection is primarily due to the compatibility between mineral oils and the properties of CFC refrigerants, making them suitable for efficient lubrication in refrigeration systems. Mineral oils have good thermal stability and are effective at reducing friction and wear on the moving parts within compressors, which are critical for ensuring the longevity and reliability of refrigeration equipment.

In refrigeration systems that use CFCs, the oil must be able to dissolve in the refrigerant to maintain proper lubrication and functionality. Mineral oil meets these requirements well. Additionally, the use of synthetic oils, while beneficial in certain applications due to their enhanced performance characteristics, is not standard for CFCs as mineral oil is simpler and cost-effective for this purpose.

This compatibility with CFC refrigerants, alongside its availability and effectiveness, solidifies mineral oil's position as the preferred choice in these systems.