27 degree delta while towing
On a two hour trip to the Florida keys recently towing a 5000lb trailer my freshly studded truck exhibited a 27 degree delta. I've also seen a 20 degree delta without a load.
The truck has a new oil cooler and an egr solution. It went through the mother of all coolant flushes prior to the mechanical work. I also run a coolant filter. I asked my mechanic, who is a specialist in the 6.0 what he thought of all this and he said it is no big deal.
I am not in the least worried. If I start barfing out of the degas I'll let y'all know.