Car runs too cold on highway and too hot in traffic

[euroZ06]

So, when im on the highway my temp gauge is at the second dash. When i crouse around town it will get a little higher, closer to the middle (but not quite). If im in heavy traffic it gets to the third dash. I have a fairly new radiator(year old), but ive been told its not as thick as it should be. I have a new 160 thermostat and expansion tank.

Any ideas? Im a bit worried about the car running cold on the highway...

[myk]

You've got to verify the 'temps that your car is running at, as your stock gauge may not be reading properly.  Then , go from there...

[HPP]

Typically, running hot in traffic is not enough or properly routed airflow over the radiator. Conversely, running hot at speed is a water flow problem.

Yes, verifying exact temp is a good thing to make sure it is ready correctly. However, if you have anything blocking airflow into the front, have extra holes the radiator core support, don't have a shroud,  or have a fan that doesn't move enough cfm of air, any or all of these can contribute to inadequate airflow.

[euroZ06]

Im pretty sure i have the wrong fan, but i rarely run into overheating issues as i try to avoid traffic.

What about the car running too cool?

[RallyeMike]

The only way it runs too cool is a non-working or non-existent thermostat. The second dash on the stock gage should most likely be ok.