I think the distinction that has not been made so far is wear vs. engine melt down.
I would never suggest that the Boxster IMS issue is related to dirty lubrication. We know that is a design issue.
Now, if someone wants to reduce nornal wear on an engines internals (for whatever reason) they should care about the quality of the oil, as that is a major factor involved in wear, along with the intrinsic engine design.
Again, used oil analysis does not lie. If even the best synthetics are shot north of 10K miles, these oils cannot be doing their job and extra wear will result.
The only issue is whether anyone cares. Porsche would not be concerned because this wear would not generate any issues during the warranty period.
However, the flip of the coin is, if you Porsche engine blows up under warranty, you can BET they will be checking your maint. history to see if you changed the oil according to their rec.
