I was waiting to make a comment of any value because there are folks on here more knowledgeable that me about this, but I'm in the same camp as them. The dexos spec *might* be a step above standard API/ILSAC specifications. The euro approvals are far more stringent. To me, it's a no brainier to use euro in domestic/Asian DI/turbo applications, the only decision is if you need mid or full SAPS. The ESP, to me, fits the application perfectly. In the 0w30 viscosity you're getting a high HTHS 30 weight that's practically a light 40 according to the kv @ 100C. You *might* take a small hit in fuel economy but is it enough of a difference to make a difference? Probably not.