In a typical air conditioning (AC) system, you don't need to add oil separately when adding refrigerant. The oil used in the AC system is typically already present in the compressor and circulated with the refrigerant throughout the system.
The refrigerant plays a crucial role in absorbing heat from the indoor air and releasing it outside, which cools down the air inside your home or vehicle. But it also serves another critical purpose: lubricating the compressor. The compressor is the heart of the AC system, and it needs oil for proper lubrication to prevent friction and wear on its internal components.
When an AC system is manufactured or serviced, it is charged with a specific amount of refrigerant and the appropriate quantity of oil. If there's a refrigerant leak or a need to recharge the system, it's essential to ensure that the correct amount of refrigerant (and thus the proper amount of oil) is added. Adding too much or too little refrigerant can affect the AC system's performance and may cause damage to the compressor.
If your AC system is not cooling properly and you suspect a refrigerant issue, it's best to have a qualified HVAC technician inspect and service the system. They will have the necessary tools and knowledge to handle refrigerant properly, check for leaks, and recharge the system with the correct amount of refrigerant and oil if needed. Attempting to handle refrigerant without the proper expertise and equipment can be dangerous and may lead to system damage or personal injury.