What should the accurate operating temperature be when the engine reaches its normal temp? The scale starts at 120 f and my car is running over half way of the meter.

I used to run a 180 degree thermostat in the summer and 190 winter.I found that my car loves the 190 all year.The normal reading on my guage is the needle just covers theright side of the"M" on the word TEMP. Daniel

I use a 180 degree thermostat and my guage reads between the "E" and the "M".