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so... and yes weird... I notice as my oil ages the car has shaking issues - like OP etc. This does not happen in sport mode. Once the oil is changed - the car runs smooth and accelerates properly. 2015 650i x drive w M sport 10k miles.
Ive advised the dealer - he says its because I don't drive the car as much as I should and the oil thickens. I believe this is BS.
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