Just because your BMW dealership suggests it, doesn't mean you need to listen. Especially when you have a nearly-new 745il. They brought it in for a gasket issue, and we found this. If it weren't for the gasket, though, who knows what could have continued to grow inside this engine:
http://www.fluidmotorunion.com/archives/5102
http://www.fluidmotorunion.com/archives/5102
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