I know everyone has their own opinions on oil but a while back we were warned about the new oils and the fact they do not have zinc in them anymore. I have read several articles on the problems we can have with old flat-tappet style engines with the new oils without zinc. I have used synthetics for about 16 years now and have found only one which blends an oil for older engines requiring a high zinc formula. Amsoil makes one but only in a 10 w- 40 or a 20w-50 weight. It has an AMO stock number for ordering. Does anyone else have a listing of conventional and synthetic with zinc except for Lucas break in oil? Just wondering what you guys have found. By the way,it looks like the engine we took out several years ago with a bad knock has severe lifter/ cam wear. Dennis
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16 years ago