Normally you do not need to add oil to your AC compressor after it is installed, unless your installing a new compressor or if their is a leak in you AC system. If you do need to add oil check the compressor specifications on how much oil is needed.Click to see full answer. Regarding this, do you have to add oil to a new AC compressor?Every automotive air conditioning system comes from the factory with the exact amount of refrigerant the system requires and the exact amount of AC compressor oil pre-installed. Once you’ve got the correct type of oil, you can use the Red Angel Oil Injector to add the AC compressor oil to your system.Secondly, can you add too much oil to AC compressor? While installing a new compressor or any other parts in your AC system, it is imperative that you add the correct amount of oil. If you add too much oil to the system, it may pool in various places of the system and can coat the inner walls of the evaporator and condenser coils. Also asked, do car AC compressors come with oil in them? New 134a rotary compressors come with a full system charge of PAG oil, which is compatible only with 134a refrigerant. As stated above, it is important to fully evacuate your air conditioning system to assure that any contaminants have been removed before attaching a new compressor.Does 134a have oil in it?Yes there is oil in the system to keep the compressor lubricated. It is carried throughout the system in the refrigerant. It is usually added in when the system is charged.

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