Well I went home last night and put a new drain stopcock on the radiator. That's where I thought (or at least hoped) the leak was coming from. I also put in some Water Wetter. I took it for a 20 minute drive and it never got above 215 until I shut it off in the driveway...when i noticed the radiator was leaking profusely...not gushing, but more than just a drip. It's coming from the driver's side towards the front of the car, from the radiator. I can see the leak, and it was coming out in a stream about the size of a pencil...not good. I guess I now have an excuse to get a Be-Cool radiator, or get mine repaired. I guess it will depend on how much they charge for repair. Eventually, I'm definitely going with the Be-Cool. I'm not sure if the 15 degree drop in temperature was from the Water Wetter or from the fact that I was just losing the coolant. Looks like no more driving for me this year. I can't afford a radiator right now