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Message: <blockquote data-quote="Scott Tanner" data-source="post: 570446" data-attributes="member: 58759"><p>this article was probably written years ago, where yes, you didn't want to do the synthetic in a new engine. that is not the case anymore. automakers use synthetics right from the factory now. engines are built so well right off the bat, that there is not much to break in and seat, save for the piston rings.  i would not call the author of this article a credible expert or source on this subject, merely his educated opinion. seek out scientific studies independent from automakers and oil companies. of course, this is just my educated opinion, too...:blink:</p></blockquote><p></p>