Greetings, I have 1993 G20. recently purchased from original owner. Car runs and looks excellent. However the A/C compressor has begun to make a whining noise from the pully. I took to mechanic and he wanted to replace. I am hesitant because the air is ice cold. I was speaking to someone at auto parts store and he advised you can lubricate the compressor by putting a lubricant in the system. He showed me product and hose to connect to system. I would never attempt such a process, however if there is a solution available other than replacing the compressor I would like to do so. Can you advise if such a solution exists? Thank you, Terry