[cnavarro]

That's typical. The only way to keep the coolant at the cruise temp is to make the fans come on earlier. There's a thread on the 996 forums at Renntech on how to do the mod:

http://www.renntech.org/forums/index.php?showtopic=28093&st=0&p=148785&#entry148785

I plan on doing this mod to our Boxster myself as I see the very high trigger point for the fans as the real limiting factor.