I was speaking to an Alpina technician at the Goodwood FOS a few weeks back and he told me a lot of very interesting info about the M division, oils and tuning, a lot of it I wouldn't like to publish. He worked for BMW for 12 years before joining Alpina too.
Alpina test programme is very special indeed, modelling, wind tunnel, road and track. Sorry getting off track
Anyway, they have run E92 M3 on either 5/30 or 5/40 and the 0-60 drops by 2 tenths.
The engine did consume more oil too compared to when filled with 10/60.