* Compatibility with refrigerants: Many refrigerants, such as R-12, R-22, and R-134a, are not compatible with detergent oils. Detergent oils can react with these refrigerants to form sludge and other harmful deposits. Non-detergent oils, on the other hand, are specifically designed to be compatible with these refrigerants.
* Low foaming tendency: Detergent oils can foam when they are agitated, which can lead to problems with compressor performance. Non-detergent oils have a low foaming tendency, which helps to prevent these problems.
* High oxidation stability: Detergent oils can oxidize more easily than non-detergent oils, which can lead to the formation of harmful deposits. Non-detergent oils have a high oxidation stability, which helps to prevent these problems.
* Lower cost: Non-detergent oils are typically less expensive than detergent oils.
For all of these reasons, non-detergent oils are the preferred choice for use in compressors.