Maintenance, Maintenance, Maintenance!!
My 2 cents:
-Use
ford/Donaldson air filters for the best filtration. When I had my 6.4 I spoke w/ Aaron over at Rudy's and AFE and both confirmed that the factory Donaldson flows more than enough to adequately feed a 6.4 on factory twins at their max flow. I told the AFE tech my basic goal of IDP tuner on factory twins and he talked me out of the AFE and told me stick w/ the Donaldson.
-Use
Ford or fram(never thought I'd say that:doh
for the oil filter, there is a patent on it and Fram does have the rights. Look for the patent. Look up my oil filter issue I had using a bosch filter (bosch, Mann and Puralator same company). I've read the same about the fuel filters as well.
A few companies make the coolant filter setup. There are vendors here and amazingzon has some as well from the same original manufactures. I got mine from a vendor here but made the order on the amazing website. The ballc@ck leaked and one of the hoses was starting to crack. I got new valves from a local hydro company and new coolant hose and I'm back in biz. Each time I've changed the filter I've cut it open to be very unimpressed/surprised. I think the system is getting filtered but I'm not finding any debris. The original radiator leaked at 180k and the system was flushed at that time so maybe that is why I didn't have any sediment in my system, who knows.:shrug:
You can order your coolant flush through Ryderfleet solutions. In hindsight I would have increased the flush %. IMHO Do several water only flush w/ the thermostat out then use the flush stuff. Restore takes care of oil/grease removal and it also removes any silicia gelling. The Restore Plus removes rust and scale. I ave 8* difference before and after so YMMV.
Like mentioned above the HD cat coolant will work as will Evans waterless coolant. It's a class 8 coolant but it's very expensive. IMHO I like the Zerex/CAT type HD coolant, available at Orielys and other places. I also use the Mishimoto hi-temp stat. I towed summer and winter in the 10k range and drove like a madman w/ no overheat issues on TTY studs.
I have over 315k or so on mine

. It was deeleeted at 298ish and was 100% stock until then, on the original oil cooler and egr cooler, no tuner no deelete.
One thing I think helped it's longevity is it was 1 owner, previous owner was RELIGIOUS on his oil/fuel and air filter changes only using Ford filters AND the truck was usually under load for long periods of time ( continual hot exhaust gases burn off more junk IMHO). He
always had a trailer attached to it and his job sites were always a 30+ min drive in any direction, he drove from San Antonio to Montana several times a year from 05 until I got it.
Since I have tenatively planned to keep the truck as I got is super cheap and it runs great I did studs last week cab on. It's a major PIA, hind sight I'd find a way to lift the cab or pull the motor. I did it one bolt at a time torqued to 250 ftlbs. I know it's over but Jeremy does one stud at a time(no HG issue trucks) about 20% over and as does a friend of mine and both have great luck for DD towing/work trucks and had none return w/ the higher #.
good luck and enjoy it:thumbsup:
Oh, also maybe move to the 6.0 tech vs aftermarket for a better response.