Just an observation, there does seem to be a lot of obsession about coolant temps by Boxster owners - just do a search to see how many times this issue has been brought up.
I've owned several 50's and 60's brit and '70's japanese cars which were notorious for overheating and never saw a degree of obsession amongst their owners as I see here.
Given the inherent inaccuracies between gauges and the number of variables which can affect slight increases and decreases of the gauge, so long as you're operating in the OK range, you're not adversely affecting anything.
Individual engines all have their own 'unique' operating temps within a range and a 3°-10° variation means nothing.
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