These engines run fine on regular conventional zinc-free oil. Generally the bigger concern regarding oil is your turbocharger. A 14B is not picky.

Royal Purple is a waste of money. Dominator, VR1, Rotella, Brad Penn, or regular, plain old Castrol GTX. It doesn't REALLY matter; pick something decent, stick with it, change it every 5000km. You put enough mileage on that racing oils will easily make it 5000km before they're dirty.

When you're about to run a freshly rebuilt engine or turbo, get picky with your oil.

And at the end of the day, pick your oil based on oil. I don't know about the rest of you guys, but as far as costs go, engine oil is a small one. I spent more money on new bolts this winter than I have on oil changes for the past 3 years, and I only run AMSOil....