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mine runs 193-195 usually. I saw 200 the other day, but I was on the skinny pedal pretty hard.
 

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i rarely tow, but from cold it will go up to 206/209 & back down and stay between 197-203 all day, running hard or not
 

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I live in Texas, once the thermostat opens initially at around 208, it runs between 197-204 all day with no load. And that's in 105 heat all day.


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The older 6.7s like mine had a 190* t-stat. I think the newer ones have a 200* one. Mine run right around 190 give or take a couple degrees when warm.
 

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It was over 100 today and with the cruise set at 75 mine stayed at 207 to 210.
 

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My truck runs about the same everyone else's. In the lower to middle 190 degree range, just driving normally and cruising on the interstate. I saw it hit almost 200 degrees, after installing my Mini Maxx, and trying out a few extended, back to back, pulls on the highway, just to see what boost the truck was hitting, and to get a feel for the power.
 

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2011.5 and up are hotter tstat and a heavier pressure cap...normal for me is 200-206. Once in a while it'll drop down to 195 when the tstat opens and the coolant in the radiator is still really "cold"
 
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Now that its summer, I'm seeing 195-210 on average.

Last few weeks, its been ~98F here.

Truck cools down pretty quickly and usually averages 195-198F.
 
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