The thread you guys are responding to is coming up on being 4 years old. The poster BCA last posted 18 months ago, and sold the X5 around then, according to his posts.

That's one problem with doing additional oil changes on the assumption that a vehicle will be kept a long time. Usually they aren't.

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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