Well, it's been between 79 and 90F for the last month or so - I can't expect the truck to stay at 180F especially while flogging it uphill.
But if I lived in a colder climate, I'd likely be running a 190 or 195F thermostat, not for emissions reasons but to cook the condensation out of engine oil.
But if I lived in a colder climate, I'd likely be running a 190 or 195F thermostat, not for emissions reasons but to cook the condensation out of engine oil.