The coolant has to be going somewhere. You should fill the radiator when the engine is cold, and fill the reservior to the proper level.
Then run it, at idle and wait for the temperature to come up and see what is happening.
The thermostat may be stuck, is your heat real hot?
May be more serious problems such as head gasket if it is burning it. Is the exhaust white or a rough idle present?
Thursday, February 15th, 2007 AT 12:00 PM