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      03-03-2018, 11:41 PM   #6
DuSh
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Drives: F15 X5 50i
Join Date: Jul 2017
Location: USA

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So I'm not sure about piggybacks, but regarding spark plugs - official BMW policy (according to BMW SA) is to change them every 5th oil change. Of course that is for stock car. Just giving the info guys - do with it what you like
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