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Message: <blockquote data-quote="nizar" data-source="post: 484422" data-attributes="member: 19559"><p>Bro i.... Since yr choice is 2007 model certainly its a N52 magnesium engine. Fyi, magnesium engine has this habit .... Engine oil topping up after several thousand kms of travelling, juz in case if u r not aware.Majority of N52 magnesium engine owners face this. Mine is also aN52 engine which i got a year ago. I would hv bought an E60 with M54 engine instead if i knew  this engine oil topping issue earlier. I dont mind losing few horsepower as long as i dont hv to top up engine oil every now & then. Anyway, the choice is yours. U may consult other E60 N52 magnesium engine owners as well</p></blockquote><p></p>