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When 134a is charged in to a system where mineral oil is used as compressor lubricant, it works. How come?

April 26, 2017charged compressor lubricant Mineral Oil system Used

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When 134a is charged in to a system where mineral oil is used as compressor lubricant, it works. How come?

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As long as there is enough lubricating oil in the compressor it will keep working. Since mineral oil is not miscible with 134a refrigerant, any oil that will get pumped in to the evaporator cannot get back to the compressor and will lead to compressor failure in the long run.