It looks possibly incredibly useful. I don't have the technical background to interpret, but from the parts I can understand I would impute he knows what he's talking about.

The writer seems way too defensive and way too opinionated, but he sure has collected a lot of data, and to be honest, I’m not surprised to see some of these oils at the top. I haven’t run into any single person that has said Amsoil isn’t a top oil (ranked in the top 5 out of over 100 oils), and while some folks don’t like Mobil 1, Porsche has chosen it for all their Cars and it also ranks in the top 10.

Yeah, those same folks sometimes talk about how Porsche racers promptly drain the Mobil 1 and replace it with something else without really telling folks about it, despite the advertisement branding on the side of the car that clearly shows Mobil 1 sponsorship. I’m sure there is some truth to that, as some folks do think Mobil 1 is crap. Truth is, there probably is another oil that might give a slight advantage in some way, could be better in some ways, etc. For example, some racing oils are so thin and lite that they can reduce parasitic drag and save a couple of horsepower or gas mileage during a race, not to mention, keep temps lower. Those items alone could make or break a championship.

However, If you Google search through dozens and dozens of reviews, Mobil 1 is always up in the top ten, if not way at the very top.

"some racing oils are so thin and lite that they can reduce parasitic drag ..."