Originally Posted By: A_Harman
VR1 synthetic has no more zddp than other oils on the Porsche approved list, so it won't destroy your cats. But you should only run an oil that Porsche approves for that engine. Does a Cayenne require the A40 approval for oil?
If that's the approval rating, yes. I don't know off the top what its called exactly, but that sounds familiar from when I was reading through my manual
VR1 synthetic has no more zddp than other oils on the Porsche approved list, so it won't destroy your cats. But you should only run an oil that Porsche approves for that engine. Does a Cayenne require the A40 approval for oil?
If that's the approval rating, yes. I don't know off the top what its called exactly, but that sounds familiar from when I was reading through my manual