If you suspect a problem with your A/C system, such as poor cooling, unusual noises, or a leak, you should not attempt to add oil yourself. Doing so incorrectly can damage the compressor and other components.
Here's what you should do instead:
1. Take it to a qualified mechanic: A professional will diagnose the problem correctly. The cause might be a refrigerant leak (requiring a leak detection and recharge), a malfunctioning compressor, or another issue entirely. They have the equipment to properly evacuate the old refrigerant, check for leaks, add the correct amount of refrigerant and PAG oil (if needed), and vacuum the system to remove air and moisture.
2. Don't attempt to add refrigerant yourself: Improperly adding refrigerant can damage the system. Refrigerant is under high pressure and requires specialized equipment to handle safely.
In short, dealing with your car's A/C system requires specialized tools and knowledge. Leave it to the professionals.
