Mobile one synthetic is a completely different oil than it was years ago.
FP tested a bunch of oils and what a brand new turbo shaft looked like after a short time with mobile one synthic was horrible.
I'm sure it's fine for everyday grocery getters but you would catch me with that in any performance turbo motor. Hell I use Walmart oil in my truck and it has 322k miles on it. Doesn't mean I would put it on my Talon or 240.
In a turbo motor you should use a turbo high in zinc.
If anyone cares to read it
http://store.forcedperformance.net/m...otor%20Oil.pdf