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Message: <blockquote data-quote="paultantk" data-source="post: 495984" data-attributes="member: 6665"><p>our 528i is the N52B30. bmw's findings are that our fuel not suited to normally aspirated direct injection engines, but turbo direct injection engines OK because of different kind of swirl pattern in the combustion chamber or something, i don't remember exactly. grey import E60 buyers beware, most of the facelift 525i and 530i you see are from the UK and use the N53, and whatever reasons bmw has not to bring the N53 in will apply to those cars.</p></blockquote><p></p>