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Old 02-29-2012, 08:31 PM
mssj113 mssj113 is offline
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according to my local engine builder, a stock flat tappet engine that has 20k miles or more is almost always safe from scuffing without additional zddp.
its trying to break a flat tappet engine in without zddp that eats cams.

as for hypermiling, a fella that stops by to chat regularly sez his numbers went up noticeably when he went to synthetic oil...

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