Bruce, Great information on synthetic oil. Where does this fit in on the issues with low zinc killing cams in flat tappet engines? Is synthetic safe for these engines? Also, should conventional oil be used for break-in before switching to synthetic? When is it safe to switch? Thanks, Todd On Thursday 09 August 2007 21:33, Bruce Hevner wrote: > I have been watching the Syn lubes thread. _______________________________________________ Amc-list mailing list Amc-list@xxxxxxxxxxxx http://www.amc-list.com/mailman/listinfo/amc-list