[Tigers] Motor OIl

[Richard]

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?

What oil (weights and or brands) should be used in our older engines, or
should we use an  additive to increase the ZDDP?

 

Thanks

 

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