Actually, I agree as well with Ard. There isn't much to be gained by arguing the merits of one oil over another, it is easier just to compare the API specs, and any API-SM oil will do well IMO. I think Mobil 1 or Castrol work fine.

I just saw us headed back into the "what is a synthetic oil" debate. That was settled over a decade ago, when Mobil 1 claimed that they owned the definition of the word, and lost in court to both the government and the API.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue