Mobil 1 Recommends 0w-40. I have been using it in my car, but the dealership recommends 5w-40...

02 A6 Quattro 3.0L

Should I even switch to a heavier OIL i sit in Traffic allot and i commute quite a bit.

If i should switch what oil would be better for my engine (I hear my lifters Sometimes)

5w-40 Choices...

http://www.mobiloil.com/USA-English/...a_M_5W-40.aspx

http://www.mobiloil.com/usa-english/...uck_5w-40.aspx