beleive the low speed fan runs all the time and the high speed kicks in when the coolant temp hits 212 F
now its up to you but as long as the fans kick in I wouldn't worry about it, the guage isn't calibrated per say so it can only be used as a reference not direct measurment
now with a OBDII scanner the V6 runs around 190 at temp, the thermostat temp and the fans kick in a 212 F and as a side note the timing goes to 0 degrees advance as hit 212 F
