In the turbo? That would be a good choice. German Syntec would be good too. I'd look at the new Honda HT-06 spec for guidance. However, you have a car with a few miles, and I suppose your tune is something beyond oem. So, rather than the thinner 30 weights, sure...a light 40 or heavier 30 like GC. If you still have consumption, move up to 5w-40, at least.
A custom turbo set-up is one of the most ideal uses for a UOA. For a plain stock car, I could just look at other people's UOAs and generalize. A custom set-up really calls for UOA if you want it to last.