I have a 2008 SRT8...my running temp after the thermostat opens is usually 3-5 degrees lower than the midpoint of 215. After I have been driving maybe 20-30 minutes or so (both stop and go and highway) the temp might sit on the midpoint or 2 or so degrees past that, then come back down and then up again. Is this ok? This happens whether I run the ac or not. There seems to be not much difference when the ambient temp is high or more moderate. Granted, I have had the car only a month, and the weather here in NC has been hot and oppressively humid. My car has a shaker hood and side exhausts. I have heard that HEMIs run kind of hot, but I am paranoid about overheating. Is the running temp and the variations I described a normal thing? Should I get it checked out? Thanks!