Boxster Started Overheating at 40° - Help!

[rick3000]

Just a little update.
I took the car into Porsche yesterday, and they did a full inspections and didn't come up with anything. The coolant was a little low, and they didn't even top it off. The car is still heating up, so the needle sits right in the middle of the 0 in 180, but that only happens in traffic. I am still a little concerned because it was 24° yesterday, but when I am going fast it hangs around the 180 mark which is good.
Also, can I top off the coolant with regular coolant, or does it need be from Porsche?
Thanks for the help!


Also, get this. It took me five and half hours to get back home from the Porsche 26 miles away. Yes, five and a half hours! It snowed 1" so people were going 5mph and crashing into each other. The freeway was like a parking lot. The police here are idiots. I like what they do for us , but they are inefficient. It was the worst traffic I have ever seen(worst than LA at rush hour). I now know, why some DD are tips. The manual in bumper to bumper for five hours was torture.