What temperature the dash gauge reads is going to be slightly different on every car; it's not really meant to be a 100% accurate gauge. If you really want to rely on the dash for your temps., what I would do is install a temporary aftermarket gauge(one that is known to be accurate with the probe/sensor installed in the dash gauge location), and go for a cruise taking notes on what temps. you see under all the varying conditions. Then, I would hook up the dash gauge again, go for an identical drive, and compare readings. That would probably be the most accurate way to interpret your temps.I was curious if any one could tell me on my coolant gauge all fox body's start at 130 and end up at 270. Does anyone know wat each tick mark represents I looked in the chiltons book and online and could not find anything, even the manual just say in between normal is safe. I just would like to know so that I know what temperture my car is running thanks.