My car is boiled over at 240. Has happened a few times so I know how hot it can get before it's gonna puke. I get nervous at 210 and start looking for somewhere to go and cool off. As long as it doesn't pass 220 I feel I'm ok but if it goes past there it usually means something is wrong and it aint gonna stop climbing, on my car anyways. It's a short trip from 225 to puking on the street for mine.