How to Refill Automotive Refrigeration Oil?

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Automotive refrigeration oil can be refilled using the following methods: 1. Refill through the compressor—start the compressor at idle speed, operate the control system at the coldest setting and highest fan speed for 20 to 30 minutes to allow the oil to return to the compressor. Then, turn off the engine, release the refrigerant, remove the compressor from the vehicle, and drain the old oil. Directly refill or top up with new oil. 2. Use a specialized vacuum tool to extract air from the air conditioning system, then utilize negative pressure to draw the refrigeration oil into the compressor through a yellow hose. The required amount of refrigeration oil varies by vehicle model. The exact refill quantity can be found on the compressor's nameplate or in the vehicle's user manual. Owners should simply follow the specified amount to add the refrigeration oil.