It's 110 outside and I was just driving for 20 minutes on the highway at 70mph. In the morning when it is 79 on the same highway it only gets about to about 80C

Presumably, the a/c is on...............it's fine.

See that red zone above 120C? That's when you get into problems.

Just be sure you have a good pressure cap and proper 50-50 antifreeze in it.

Mine runs that temp all the time, even in winter. I think many of us have gotten a thermostat that runs a bit hotter than advertised. Not a problem in my opinion. A lot of the 7.3 Powerstroke guys install a warmer thermostat than stock as an efficiency and driveability mod.

__________________
Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 400,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 22,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.