I know it's not recommend on the Jeep TJs 4.0 to run anything lower than a 195* thermostat. With that being said if I wanted to run say a 180* stat is there a fuel table setting where all I would have to do change the temperature at which the PCM would recognize full operating temperature or would it be much more complicated than that? As it is now the engine would run rich with a 180* stat. I'm not going to install a 180* but I have increased the cooling capacity of my system and with a 195* stat installed in the cooler months it usually runs around 195*-200* instead of the normal 205*-210*. I'm seeing a drop of almost 2 mpg when the operating temperature is below 200*. Any advice welcome.