Cooling issue on highway

I get it, most people here are into drag racing. Pro-stockers try to run 100-120° at the start of a run. Well, NASCAR runs at 300° (not kidding). Both are detrimental for the life of the engine and highly specialized to that type of racing and class rules, and those engines all get torn down after the race.

Running a normal engine cold just damages parts.

If you've got a 16 psi cap on your radiator your boiling temperature is closer to 250°F.
Meh, I like mine in the 170-180 range.