I will be doing an egr delete this weekend and with what I have been reading I shouldn't have to do an oil cooler replacement unless my temps are unreasonably high. What would be considered unreasonably high for these trucks?
That's not a good long term solution. Your check engine light will keep coming on. It'll set p0401 EGR insufficient flow detected. Get a tuner and a oil cooler. ECT and EOT deltas should never exceed 15 degrees under normal driving conditions