Under normal circumstances, the compressor oil of the car air conditioner is best replaced once a year. Compressor oil is actually the refrigeration oil that car owners usually say, and the existence of air-conditioning compressor oil is to ensure the normal operation of the car air-conditioning system, thereby prolonging the service life of the air-conditioning compressor and providing corresponding protection for the refrigeration of the air-conditioning . Therefore, it is best to replace the oil of the car air conditioner compressor once a year.
What car owners need to pay attention to is that it is not allowed to add too much or too little air conditioner compressor oil. Too much or too little oil in the air conditioner compressor will cause damage to the compressor to a certain extent, so car owners should pay attention to checking the amount of oil in the car air conditioner compressor when maintaining their cars. Replace the compressed oil in the vehicle to avoid damage to the compressor due to improper operation.
（From:Owner's Guide）