I post the finding in another thread .... if you go to the bottom part of the page, the AMSOIL answer / comment is there .... Note: the article does not have a published date, therefore, I am not sure if the status has changed.
As far as Mobil 1, 0W40 European Formula is the only one recommended for BMW oil top up or change.
Originally Posted by stealth.pilot
What do you think of AMSOIL Signature 0W-30?
This post seems to rate it highly - based on the data. Mobil 1 looks pretty good in this test too.