Well, why do you think no one has bothered to test it? Probably because no one dares run it for an extended interval, and THAT might be because the ”Advanced” formula looks IDENTICAL to their regular synthetic. And there are plenty of tests on THAT oil and if memory serves me, I’m not sure many of them appear like they would be a 20,000 mile oil.
I’m not saying I wouldn’t use Super Tech, I have, but I wouldn’t trust it to go 10,000 miles and beyond. And that’s why I wouldn’t trust Advanced Super Tech, because it looks just like regular Super Tech.