Most common reasons that A's overheat?

[TinCup]

Great colors on the pickup. Almost same as my coupe. I have been chasing this gremlin for a couple of weeks. Are you running straight water or a mix of antifreeze? How long did it take to overheat? Were you driving 40mph or faster? Do you have a temp gauge or just the motometer?

I spoke to another barm member down in Dallas and while he is not overheating he is running the same temps as me. At the temps we are seeing in OK and TX we don't know if we can get them to run any cooler.