Going to a higher coolant thermostat is a mixed bag for me. Pros: Higher oil temperatures and some increase in engine longevity. Cons: Higher engine temperatures mean higher induction temperatures for forced induction. It also means having to change the fan on/off temperatures if a coolant thermostat swap was done at the beginning/end of summer.
If I pop for HPTuners so that I can easily change the fan on/off temps then I'll switch to a higher temperature coolant thermostat and retest. For now, with a fan preset of 170on/165off the switch to a 180+ thermostat means the fans will not shut off once they turn on. It would also allow real-time logging of intake vs. engine temperatures on cooler winter days to see if there is a significant difference.
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