Humm, I know it's only a few ounces. But every compressor could be different. If no one chimes in I'd suggest calling the dealer in the morning. And if I remember correctly the stuff I used to use was called Ester oil. I don't know if it comes in different weights.
PAG OIL Ford part number. F7az-19589-DA (Motorcraft YN-12-C) that is what you need add same amount as drained from old compressor. Spin shaft six to eight times while collecting old oil from compressor. And I would add one once of fluorescent dye.
I redid my a/c on my truck. I flushed the lines out with alcahol to remove moisture, replaced the orphace tube and drier and rented the vacume pump from autozone. Wasn't a bad job just double checked everything.