I'm late to this thread, but the turbo problem, don't run any oil with a spread like 0w-40 that is available from Mobil 1's product line in a turbo engine. If you do, check it frequently and as it shears down, be quick to change it.
And that link about M1 and performance, pure advertising. At the level of F1 racing there is no such thing as a 3 percent gain in engine performance do to an oil change. Believe me the previous oil was also a cost no object formula. There might be a three precent gain over a conventional synthetic to the racing version, but not between to racing versions of a similar spec oil.