Over cooling!

I've heard about the cardboard trick though, to prevent air-flow. I might try that. I thought it was odd though because it never had any issues in warmer weather.

Like I said, I'm pretty sure the thermostat is still good ... I got one of the better ones b/c I didn't want to replace it (after going through two of them within 50 miles). And the radiator cap? I never thought of that, how come?

I'm not sure the 180 might be the way to go. Back when I had the 180 in it, it always operated on the high side of the temp gauge on my dash-board. Not sure if the dash is just screwed up or not(it is on the 'to-fix' list as it is). Though with it acting so cold, maybe the high end is what I need!