WARNING: This page is about a different car, the 2008 BMW 750i, 2007 BMW 750i, and 2006 BMW 750i. However, it is still accessible from the selected car via links, so may be relevant.
A/C SYSTEM, OIL QUANTITY E65/E66/E67 TECHNICAL DATA
The data on the A/C compressor rating plate are definitive Refrigerant oil Fill quantity R134a