Have you thought about upping your oil thermostat? On the ecoboost forum the aftermarket company supplying the oil coolers recommend running the 205 thermostat. As does the guy who has a shop that installs the coolers says they run 205 on all their builds. Their theory is the engine needs 200 degree oil to burn off deposits and moisture. Probably even more important on these complicated new diesels designed to run hot with egr and dpf filters. Sounds like a recipe for a clogged dpf. Might be different on a deleted truck but you’d still want to run it hard enough regularly to burn off the sludge.Depends on your service writer or service manager. I've had a few warranty items covered while tuned, AGS deleted, oil cooler installed, and catch can. Never a word. But, they weren't engine failures either. They did recently warranty my DPF.
I'm at 135k miles. Engine oil is down around 30º across the board, coolant down 10-20º. Base operating temp of my oil is 167º due to the 180º oil thermostat.