Installed my cts and this is what it read

[creeker6.0]

Mt ect read 184f
My eot read 193f
This was on an 8mile straight road about as flat as it gets set cruise to 56 out side air temp is 54f does this appear to be an issue forming. What should my running temps be

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[goosegodz]

I believe you may need to run the truck alittle longer if it was only an 8 mile road. something like 30-40 minutes at 65 to get a clearer picture of your trucks deltas....
Someone whom knows forsure will chime in and let ya know...

[2 stroker]

Originally Posted by creeker6.0

Mt ect read 184f
My eot read 193f
This was on an 8mile straight road about as flat as it gets set cruise to 56 out side air temp is 54f does this appear to be an issue forming. What should my running temps be

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Looks like your t/stat is stuck open get a new one but they look ok but will get true reading when fixed
[RT-1169]Motorcraft Thermostat-RT1169-Ford Diesel Trucks - Diesel Filters,Additives,brake rotors, and brake pads for Chevy, Dodge and Ford Diesel Trucks
Ford t/stat starts to open at 192.2* and is fully open at 219.2*
2 stroker

[PGreenSVT]

I second the Tstat needs to be replaced before you can get an actual read. make sure the truck is fully up to operating temp and check at 65mph after running for 5 or 10 minutes.

[jerg_064]

I got a brand new t-stat a while ago......Let's just say motorcraft's quality control isn't exactly that great....Me, you and others get new T-stats that seem to open at 184 to 188....I've been told you can modify them to the right spot with small shims/washers...Will try it some day....

So before you go changing it out just to possibly get the same results, the real question is does the delta range remain the same with the lower temps or will the oil heat up more regardless after so long.

[creeker6.0]

It seemed that the oil temps stayed cooler til the motor hit around 180 then the oil temps started to climb both hit 184 about the same time then the oil temp cont to rise til it got to 193

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[diesel rookie]

I put a new t/stat and oil cooler in this week and mine run ect 188-190, eot 194-196 after its good a warm. You could replace the t/stat but I would get it out and drive it for a while first.