Hello Bob,
I do not think it would be Kosher to discuss the Z's alleged-characters here. As you already suggested, the character you mentioned has been a beaten-horse many many times. I had a 280Z before and was very pleased and has been, and will always be a Z-fan. I will always lurk here hoping for the next Z-generation.
All I can say is that the 997S remains at 210 deg max using the same path I used to take on the Z; the Z would hit 250-260 driven a lot easier and slower than the 997S. Given that the regular 997 has a lower HP rating compared to the S, I wonder what the temps would be.
As a Volkswagen (possibly Volkswagen/Audi/Porsche tech?), you probably have your own guidelines about oil and engines. Let's possibly leave that as-is to maintain harmony.