With enough research one should be able to determine the factory fill level for the compressor, the stock York unit or the common Sanden replacement.
As for how much oil the entire system requires I have never seen a published value.
Likewise as for how much R-12 the entire system requires, to the best of my knowledge no one has ever found published specifications.
Over the years I have heard everything from 2 1/2 pounds to 3 1/2 pounds. However, this is a case of really wanting proper operation and for that most would rely on evaluating high and low side pressures and actual vent air temperature
If your drier has a view window,, and most do, filling until the system shows no air bubbles is certainly another approach you can take.
FYI - R-12 is readily available on craigslist and eBay and you should not have to pay more than $30 for a 12 ounce can.
Larry