The normal operating temperature for most all vehicles is measured by the temperature of the cooling fluid. It should in most cases be around 180 degrees. The actual operating temperature inside the engine may be in excess of 400 degrees.
The normal operating temperature for your Dodge Intrepid would be around 150-200 degrees. This would be with normal usage and not over-heating your engine to where it cannot work correctly.
The normal operating temperature for any and all commercial engines is right around 200 degrees. Your thermostat should open at nothing higher than 230 degrees.
