is it normal for the gauge to go up and down regularly, like today i was drivin and i noticed it at about 205, then it went back down to the standard 195, stupid question i know, but its gotta have an answer

 

Does it move while you are in a constant drive? Mine usually has minimal movement, like when I stop at a long red light or go through a drive-thru or something, but it never moves too much. If it is staying in the 195-205 range, I would think everything is normal.

 

mine moves a little too.thermostat opening and closing.normal.