Just remember, when you're idling in traffic, there is NO air flow to the radiator until the fan cuts in, usually around 215 or so. So... expect temps to peak in city driving in hot weather. I run my AC which keeps the fan on all the time, and keeps temps down some. Still, if you track in hot weather, expect temps to be above the fan cut-on level for extended periods. I don't think 220 or so really hurts the snake, and don't worry about those levels. In fact, unless your oil gets above 210 for a significant period of time periodically, you risk carrying a lot of garbage in it that is supposed to get boiled out (like moisture). One of the pitfalls of over-cooling these beasts.