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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Have I been using the wrong motor oil all these years? Just read several articles on the net stating that modern motor oils that do not contain enough ZDDP (zinc) and can cause damage to the cam. True or False?<o:p></o:p></p><p class=MsoNormal>What oil (weights and or brands) should be used in our older engines, or should we use an additive to increase the ZDDP?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>