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I have a '13 x1 35i with the n55 and I changed the factory filled oil @ 1450 miles and again yesterday @ 5985 miles. Those metal deposits are not staying in my engine until the first recommended oil change @ 15k miles. OP, I read on Roundel that a BMW tech IIRC has a 335is and he changed the break in oil @ around 1500 miles and used TWS oil. Not trying to start an oil thread debate but his break in oil had some high metal deposits.
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