I think the unicornism is in the lack of data regarding the ATF.
A lot of the stuff you put in the tank (other than gasoline or diesel respectively) you only hear people saying that "it definitely works for sure" but real numbers are missing.
As a side note, I'm not so sure a cat or dpf doesn't suffer from those additives and especially atf. Heck, even using the wrong oil grade can have a detrimental effect on a dpf.
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