http://www.audizine.com/forum/showthread.php/383410-Audi-oil-reference-all-you-ever-wanted-to-know
http://www.audizine.com/forum/showthread.php/429698-Refresher-what-oil-should-I-use-in-my-car
Check out the "VW 502/505" list for approved oils. The oils mentioned in the thread linked above have very good basestocks and are some of the best oils you can buy at neighborhood auto parts stores. Bobistheoilguy also has awesome threads on "best" oils.
Ultimately, it depends on how much oil your engine is consuming and how much you're willing to spend. I've never owned a V8 that didn't guzzle oil, so those always get cheap conventional. I like Shell Rotella T6 or Mobil 1 0w-40 in the S4/4k/V8 that don't burn oil.
http://www.audizine.com/forum/showthread.php/429698-Refresher-what-oil-should-I-use-in-my-car
Check out the "VW 502/505" list for approved oils. The oils mentioned in the thread linked above have very good basestocks and are some of the best oils you can buy at neighborhood auto parts stores. Bobistheoilguy also has awesome threads on "best" oils.
Ultimately, it depends on how much oil your engine is consuming and how much you're willing to spend. I've never owned a V8 that didn't guzzle oil, so those always get cheap conventional. I like Shell Rotella T6 or Mobil 1 0w-40 in the S4/4k/V8 that don't burn oil.