But I likely will use a 160 thermostat.
And where will the sub 160 degree coolant come from to close it?
It can be hard to get one's head around - counter intuitive. Installing too low a thermostat tends to set up a continuous flow - the result is all of the coolant in the system slowing rising in average temperature to a point where the temperature in the radiator is the same as what is in the block. In start and stop low speed traffic - perhaps no problem. On the freeway cruising at 70mpg the temp gauge will go up up up . . . as heat is not dissipated.
I would expect to run a hotter thermostat. A heater core with no shutoff would add a second loop and more capacity.
