Here is one from the past, if you do a search on the red tool bar on the upper right (search this forum) you will most likely find Oh....about 100 post on thermostats and every possible question related to them!!! 180's by the way, provided your cooling system is operating properly....you need enough heat in you engine to properly burn the fuel
https://www.fordbarn.com/forum/showt...re+thermostats