If you are unsure use Ester oil. It is safe for all systems and chemicals.
5W30 only. Any heaver and the engine will not oil correctly
If you are having to add refrigerant, then this means you have a leak, and you will be adding refrigerant again in a few months. It is illegal to add refrigerant to a system with a leak without first repairing the leak. So, my advice is to take it to a professional and have the leak repaired and refrigerant added with the proper equipment, which you do not have.
R 12 refrigerant.
What do you want to know about its oul changes? When, how, the cost...?
PAG oil goes in the air conditioner compressor. It is added in the same place as the refrigerant. However, this oil must be added before the lines for adding the refrigerant are put in place.
It's at top rear of the engine, near the distributor.
If it's later than 99 should be 134A
134a refrigerant
how so you turn on the daytime running lights on a 99 suburban
r134
R134a
R-134