I just bought this car. Garage kept...good condition. I have both water and oil temp gauges....both of these read very low (they come up when its running just enough that I know they are working). My heater doesn't work either. I checked and the antifreeze was low so I added almost 1 gallon of antifreeze. Still same condition. It does not seem to be overheating at all and actually runs well. All the radiator hoses get warm and there seems to be flow. Does it sound like the thermostat is stuck open?