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Message: <blockquote data-quote="Todd Z" data-source="post: 542570" data-attributes="member: 58941">After a short engine dyno time with synthetic at school we found in the perfect world synthetic gave better mpg,cooler temps, faster startup pressure, and kept the engine cleaner..On a personal scale, All my race motors were broken in with regular oil, then switched to synthetic... Every one i pulled down to inspect or modify more, had no build up, and the cross hatching in the cylinders was still visible, some after 60K miles or street strip use....I will continue to use synthetic...The switching thing is a bunch of junk, switch all you want, but why??, just like running 87 and running 1 tank of 93... complete waste of money..Todd Z</blockquote>