The car's internal temperature has been scaring me of late. When the car is warming up from a cold start, it goes past what I consider the normal "warmed up" level on the gauge and then drops to a level lower than the typical warmed up temp. And then it pretty much stays, with minimal cycling, thereafter. Last night it went about 2/3 of the way on the gauge, one tic mark away from the red zone, and then I watched it drop real quick. And then it was stable for the rest of my 35 minute commute back home. It's like whatever regulates the temp, be it a fan or thermostat, is frozen and then it releases or turns on or opens up or something. Don't know if it needs more coolant or a new thermostat or a new fan or what. Any ideas?