Thanks for the explanation, but here is a quote from my Mobil ATF bottle: "...qualified for use in GM, Chrysler, Toyota, Nissan, Honda, Volkswagen, Mazda and other imported and domestic vehicles requiring DEXRON(r)-III." I suspect I would find similar wording on Pennzoil, Shell, Supertech or any other brands.
That is good enough for me. I appreciate your viewpoint, but I see no need to go to Dexron VI "just to be safe from a licensing viewpoint" when I have substantial success with this fluid and others like it, license or not.
As you point out, my dime and my risk.