You can’t trust thermostat ratings

I don't think I'd worry about 170*. But if it's going to be one of things that you think about every time you drive, make time to swap it out. I learned to bite the bullet on those nagging little things that take up my valuable gray matter, lol.

I wonder if the laser thermometer could be off also? Could be a combination of the thermostat opening a little early and the thermometer reading low.