Thanks for your responses and recommendations. It's greatly appreciated. (Some very well-informed oil heads here!) And while this thread is still active, I have another question...this is my first turbo motor. I assume that the conventional wisdom about letting the engine idle for a short while...
I recently purchased an '06, one-owner Audi A4 w/ 2.0 l turbo engine (approx. 48,000 mi.). Upon closer scrutiny of the service records, it appears that the former owner went to Valvoline Instant Oil Change centers for servicing following the initial Audi dealer scheduled servicing. The Valvoline...