Just upgraded my 2006 Audi S4 to the 2009 Audi S5. Enjoying the car. The car has only 36k on it and still has lots of warranty. Just wondered if there are issues with the 4.2l engine regarding carbon build up. Any thoughts would be appreciated...The car has always used synthetic oil and I have just started running Shell V Power...hope this helps. Thanks.

Forrest

 

I think there is a mild issue of carbon buildup but it's been exaggerated. Maybe have it cleaned every 50,000 kms or so?