What characteristic of mineral oil makes it suitable for use with CFC refrigerants?

The suitability of mineral oil for use with CFC refrigerants primarily stems from its ability to provide effective lubrication. In refrigeration systems, particularly those utilizing CFCs, maintaining proper lubrication is crucial for the functionality and longevity of the compressor and other moving parts. Mineral oil has good lubricating properties that allow it to reduce friction, minimize wear, and ensure that components operate smoothly within the system.

Additionally, mineral oil's compatibility with CFC refrigerants aids in maintaining system efficiency, preventing issues such as oil migration or dilution that could arise with less compatible lubricants. This effective lubrication is essential in maintaining the performance of the refrigeration system and ensuring reliable operation over its lifespan. Thus, the characteristic of providing effective lubrication makes mineral oil the preferred choice in systems using CFC refrigerants.