This truck came in with one bad injector so I will walk through the process of replacing the injectors also updating the standpipes and dummy plugs and checking the oil cooler to make sure it's not failing.
They are 15 degrees across the board for any oil cooler for the 6.0, new or old. Unless your towing heavy up a grade then it can jump up to 20-25 for a short time. But ya, this guy’s oil cooler is perfect!
I have a question for ya man. What do you think of fel pro intake gaskets. I use them on gassers but pretty new to the 6.0. I don't like doing things twice. Thanks