HI i was driving my new "300zx non turbor home after buying in a different city. when traveling home the car began to overheat, i went to local garage (not alot of choices int he town). they replaced the thermostate, new fan clutch and a hose. the car runs well in the city or town drivning temp gauge is right in the middle. on the highway speeds, the higher the speed the hotter it gets. it just hits the first white line, anyone have any ideas? no coolant in the oil. the coolant is moving in the radiator.
