In the winter with the heater on, mine averages around 185 deg F. In the summer with my AC on it ranges between 195 - 205. In extreme situations (like gridlock) while running the AC it will run hotter. I like to keep it below 220 deg F, so if I'm not able to move fast enough to get air flow I shut off the AC. With AC off temp will drop to around 195 or so. The van can be run hotter than 220 for short periods, but I wouldn't recommend pushing it. Overheating can cause severe wear and/or scoring damage to your pistons (among other things). If it gets over 225 I'd recommend taking immediate counter measures. Tim