Originally Posted by JoeH
I looked hard at the BPD external oil cooler but in the end decided in was a solution in search of a problem. With a swap to an extended life coolant (ELC) or regular maintenance of the Ford Gold and installation of a coolant filter you've solved the problem of clogging oil cooler. There will always be some casting sand in the block but with a proper flush your mechanic will have taken care of that as well. I had never heard of "flushing" and injector so I'm interested in what they do. Sound like they know what they're doing and since you've already done 4 then they probably also replaced the standpipes and dummy plugs with the upgraded OEM parts.
Ditching the "Ford Gold" coolant is a key factor in keeping the EGR and oil cooler from clogging, I have a bone stock 6.0 in my 2005 F350 that i bought new in 2005, at 15k miles I did a full flush of the cooling system and replaced the coolant with Fleetrite ELC and have not had any issues with the truck's EGR system since, mostly using the truck to haul a heavy toy hauler. Being in Cali I don't have the option to do an EGR delete but if I could I would just delete it.