Thermostat gauge????? Please advise!
When I had my 160* in my truck with e-fans it would idle around 190-195 or so. It wouldn't cool down unless I was cruising on the freeway for awhile, then I'd see the temps drop as low as about 179* depending on the outside temp. Your situation sounds normal to me, especially during the summer in GA.
As stated above, you can get a standalone gauge if you want, just run the coolant temp sensor off the unused hole at the rear of the passenger side head. Or, you can use a scan tool or scan gauge to read the temp directly from the PCM.
Thunder 550 my car runs the same during the winter. Dosen't matter the temp. When it gets to 210, it stays regardless on how hot or cold outside.
https://www.flp2win.com/store/produc...roducts_id=385
Only thing that kind of sucks is you will have a cable plugged into the OBDII port whenever you are using it but considering it reads a bunch of things it can be useful for those that don't want to or don't have a laptop for such software packages as HPT or EFT live.

