I replaced the new, one week old, aftermarket 180* thermostat with the Gold Plated 195* MOPAR thermostat. It's simply amazing and stupid at the same time. This is the first time I've seen the temp gauge operate as it should, heat up to temp, thermostat opens and then you can see the temp cool down. It's crazy (or precision engineering) that an engine would be that sensitive. It was worth the $27.25 to know my cooling system is good, but the thermostat wasn't worth $27.25.
Oh, and I swapped out the spark plugs. I hope I didn't screw that up by upgrading to iridium tipped.