AC oil qty?

[S-Class Guru]

I have a litttle leak in the AC condenser on the '91 300SE.
I see a little oily area, so I know it's only a matter of time.
I guess I get to use up my last stock of R12.

Question; when replacing the condenser and the drier/accumulator, how much oil do I add back to the system?
With the condenser, it's probably about an ounce, but does the drier/accumulator come with some oil, or do I need to add several ounces?

Tks,
DG