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lets just say that you can buy this filter at any Napa store. This is not a fancy filter! I am no chemist but I beleive that this is a bogus statement as the cam went sour and someone is looking for an excuse.



A Napa gold? You really need to tell so that we can make all types of assumptions! . Seriously, though, if its a two stage like a Pure 1 maybe it can happen. Different filters DO filter out a different size 'mininum particle' size.
Also I have heard (don't know though) that Moly is a bigger particle than zinc.
Its also said that Zinc blended in my the oil 'manufacturer' tends or can be a smaller particle size than zinc additives. True? I don't know.
I do know that Comp Cams additive (again Moly) is pitch black, ZDDPlus looks like honey colored oil. Not sure if thats indicative of anything, just pointing it out.

With my ZDDPlus I run a Wix or Napa Gold filter.