I tried a 180 stat at first and when a use the A/C the engine temp would go up to 190 and above and then would struggle to get back to 180.
After I put the 160 stat in I rarely see anything above 185 with A/C on and as soon as I hit the highway it drops quickly back to 160 at cruzn speed.
Tough to explain, it's like the cooling system was unable to shed the heat load that had built up when I using the 180 degree stat.
I know that 160 engine temp is not the desired temp for combustion efficiency, but I have been running the 160 stat for 2 years/3500 miles and it works well, plugs look perfect and no pinging.
