Sorry, not certified:
http://www.amsoil.com/news/2008_worr...warranties.pdf
Amsoil takes great pains to obfuscate the fact that many of their oils are not API certified stating that they are of "API quailified" or can be used in place of oils with the following API ratings.
http://www.oilsandlube.com/amsoil_api_licensing.htm
Just use the oils specified by BMW and you don't need to worry about warranty issues.
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