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      05-07-2012, 01:24 PM   #47
X3andZ4owner
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Drives: X3 Z4 630iC
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Quote:
Originally Posted by n55x3 View Post
Something is happening around 10k km. The engine is starting to wear into itself. It is loosening up ever so slightly. Not only the engine but the drivetrain. Bearings start to get broken in and loosen up along iwth all other moving parts.

This is why you start to see slightly incresed MPG, slightly better performance etc...
Could be an plausible explanation if not the difference almost occurs over a night and is encountered by several owners that have never experienced this in other new cars.. One would think that if it's only mechanics that the engine performance occurs over a longer time and not from one day to another...
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