The rocker/valve cover is a very common area for engine oil leaks to develop from the gasket. Over many years of engine heat cycles, the rubber gasket can degrade and become hard, losing its seal. Reduce oil usage and ensure your vehicle is kept in roadworthy condition with this gasket and o-ring set from Germany's Elring. 

OEM Part Number: 11121432885
Alternative Part Number: 11121734624
Elring Part Number: 040.060
Febi-Bilstein Part Number: 01571