So it appears that they recommend that the trans oil gets changed every 30k and you made the right decision by changing the oil becuase at the very least you removed the metals from the break-in period. I would love to see the analysis on 80-100k original fill oil.
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If no codes are being thrown use Chevron Techron fuel injector cleaner (concentrate). It solves rpm fluctuating upon cold start-up. Also, for most BMW problems start off by scanning your car with the Peake Research Tool. It contains the actual BMW codes. If you want to register a newly installed battery for free (just buy a $10 cable) and google/download BMWLogger
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