Comp cam lifter problems.......what lifters?

RustyRatRod said

I was thinking about it because zinc is or was added for scuffing or sliding action, such as rocker arms against valve tips or valves and guides and it suddenly hit me that the lifter plunger and body is the same fit. Maybe there's something to it. Maybe not.

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Interesting observation. On first blush, I am thinking not since they fail without or without ZDDP. I first ran into this over 10 year bakc with Mitsubishi replacement 'adjusters' (small lifter-like cylinders that insert into the ends of their rockers) , and then once again with a 4.7L Dakota engine. It seems to be a general loss of 'the tricks of the trade' by whoever is making them now.