Thanks guys. The dealer did the thermostat in 2005 along with a coolant flush, according to records. The coolant has been flushed regularly, but it's been about two years now based on records, and the stat has been in there since '05 so I want to make sure everything is in perfect running order.

I know once open the 80* and 85* can both exceed their speced temps and I'm at the mercy of various factors like the radiator and climate I am driving in, but I am just thinking that any advantage on my side I will take.