[russiankid]

The temp gauge isn't really a good indicator of the engine temp. The sensors are not sensitive enough to indicate the proper temperature of the engine, not to mention that if the coolant is up to temp it doesn't mean the oil is. I usually drive the car for a good 20 minutes before I even think of revving it.

Angdefeo, you can't really tell if the PO warmed the engine up or not. Best thing to do when buying a used car is to do a leak down test. It will tell you a lot.