I by no means I am an expert in this topic. I, as many in this forum, like to read from different sources and opinions before reaching my own. I am an engineer and researcher as well, and I don't rely on one source only. By no means I am saying he is not correct. But, by many means, I do question someone with such an aggressive writing style. Some people may enjoy and be convinced by such a writing style, but some others don't like such style.
You have to read though many paragraphs of him crediting himself and/or being credited by individuals. In my opinion he bashes his critics. Per example, just at the beginning of his blog he states:
"Those critics have tried to discredit my Engineering test data, but they have failed miserably, as you can see from the continual amazing growth and success of this Blog. They think they know more than what Science proves to us. Who do you think will win an argument against Science? Those critics are ignorant of the FACTS, and instead they make emotional outbursts, relying on false beliefs and opinion, to try and redirect people’s understanding about motor oil. But, all their failed efforts show just how wrong they are, and intelligent people simply ignore them. It is the critics’ loss, because they continue to believe and follow bad information, while the rest of us make use of, and benefit from, the FACTS. So, I have a question for those critics, “What have they ever written about motor oil that has been READ NEARLY ONE MILLION TIMES?“"
Again, I am not trying to discredit or credit anyone. I am just bringing up different opinions out there that I have read, before reaching my own. This is a link to another blog that discusses this topic with more scientific detail.
http://xtremerevolution.net/exposting-the-flaws-in-540rats-engineering-test-data-blog/http://xtremerevolution.net/exposing-the-flaws-in-540rats-rebuttal/
At the end of the day we don't know any of these bloggers so it is up to us to try to be as informed as possible. I personally have used Mobil 1 for many years. I have contemplated switching to Amsoil oil many times but I haven't. I have also contemplated switching to Driven GP-1 oil but I haven't. There are many ways to skin a cat. There are many opinions out there. So it is very difficult to really know which one is best.
PS: I don't necessarily disagree on the conclusion about Zinc, but I think this is a more complex issue since it is a combination of many additives that work in concert rather than just Zinc. I agree that oil companies will say whatever for marketing and that's all of them.