Recently bought a 7 and one little foible is that the temp gauge (a Racetech unit) once its up to temperature wanders around between 75 and 85 degree. Will go up to 85, then quite quickly drop to 75 and after 20 seconds or so, go back up to 85 in another 10 seconds or so. Whole cycle takes 30-35 seconds and happens pretty much continually. Car doesn't seem to run hot - fan kicks in at about 90 if stationary or driving slowly (10mph down the street to the house & parking up occasionally), so potentially a non-issue. Not sure if the car has a thermostat to be honest. I have nothing other than my own curiosity/lack of knowledge making me ask the question Just after thoughts/experience/knowledge as to whether its not worth worrying about, a potential gauge issue, a sender unit issue (though no idea where it is) or something potentially that needs further digging? Thanks in advance Paul