these oil leaks around valve cover as John W. said is most of the time warped cover itself .But not the later 930 updates.But the gaskets are lately just a crap.I cannot get Wrightwood graphite gasket in Europe..so I ended up making it by myself from material i have.It is a PITA work but it works well for me.
Also it is too bad these washers with rubber inside are NLA , at least i do not know of any source.
