Thermostat temperature recommendations

A car will run warmer than 160 even with a 160 thermostat. The thermostat controls when the water is allowed to start cooling, not what temp it will stay at. you want to get your temp up to "operating" temp as soon as you can, oil works better up there, engine efficiency is better, and you burn off crud better. Thats why modern engines run much higher (my truck runs at 210). I was always of the cooler is better camp until I started doing some reading.
here's but one article, but it isn't the one I was looking for, but there are others out there.
https://www.motortrend.com/how-to/engine-oil-temperature/#:~:text=Cold engine oil causes excessive,between 230 and 260 degrees.

If your car runs hotter than you want, a lower temp thermostat isn't going to change that, it might buy you a couple minutes before it gets to that temp because coolant will start flowing sooner, thats all. If you want it cooler, you need to beef up the system- Radiator, fan, shroud, pump, proper hoses, air flow,(into and OUT of the engine compartment). Notice the hood vents just behind the radiator on Jeeps when they put the 5.9 in the grand (98), thats a low pressure zone, so it would "suck" the air out of the engine compartment. The back of the hood is a high pressure zone, (think about how much air comes through your floor vent boxes) so vents far back will try to jam more air under the hood, with no place to go.