How to find out if my car AC needs extra oil and how much to top up?

Question

My car AC has been dead for a couple of years now and I was wondering the following things:

How could that affect the AC oil level? 
Is there anything I should be worried about considering my AC system has been idle for a few years
How can I figure out if there is any oil missing?
How can I figure out how much extra oil to add if any is needed?

DavidSupportsMonica · Answer

Checking oil as described in the video can only be done when the a/c system remains sealed and can maintain vacuum. Your other question presumably about the same vehicle indicates the a/c system does leak.

A leaky a/c system loses vacuum and becomes inoperable. Because the system is now empty (two years is a long time), you cannot assess its oil level using the method demonstrated in the video.

How to find out if my car AC needs extra oil and how much to top up?

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