At Highway the Fan is being used 30 to 45% not much cause the Airflow of the wind coming thru. At low Speeds the fan should be Heard spining loud like if you had it direct without a Clutch. Change the Thermostat to a Jet Performance 180 degree and you will be happy with the Performance and Temp. Before all do a Flush and clean your Radiator Fins in the Opposite Direction of Air Flow. After my Change from 190 thermostat to Jet Performance 180 thermostat my Temp has always stayed at 193 degree. That's very good for being in Miami @ Temps of 98 degrees everyday outside.
Before the 180 thermostat I used to be always at 210 to 218 on street and Highway and with all new Cooling system.