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I'm curious for those owners with a ScanGauge or who use ET Mode what you see for coolant temps while driving. ptjones on the C-Max Forum determined that the grille shutters open at 190 F or 88 C. I have not seen our car get that warm. My first day with acdii's grille cover I think I saw the coolant temp hit 90 C, but recently it feels like the car has adapted because now I never see the coolant temp get above 84 C according to ET Mode in city or highway driving. Yesterday I left ET Mode on for more than the first half hour I was driving 65 MPH on the interstate to see how warm the ICE would get with the grille cover. The outside temp was 80 F and I was using A/C. The highest coolant temp was 84 C (183 F) and most of the time it stayed right at 83 C (181 F). I was surprised that even with the grille cover the ICE stayed so cool. This makes me wonder what other users see. I was debating taking the grille cover off for our road trip because of being concerned about ICE temps driving through the Rockies, but now I'm thinking that the ICE stays cool with it on and am wondering what would happen if I took it off. This makes me think that if I took it off the ICE would be even cooler...so I'm curious what others see for their coolant temp according to ET Mode or ScanGauge and if there's additional data that the ScanGauge can provide about this. Thanks!