Grit dog wrote:
Imo as important as its condition and how it runs today is the maint records. 6.0s rely much more on impeccable maint than their competition. Both sides of the hpop, coolant issues to name a few.
Wrong.... another misconception..... The 6.0's rely on that you use a Ford Motorcraft fuel filter or a Racor brand fuel filter (There made by Racor) that is designed with a aquablock material to prevent water getting to the injectors. All aftermarket fuel filters don't have this feature and will kill the injectors.
Oil filters again you must use Ford Motorcraft filters or Racor brand oil filters (Again they're made by Racor). All aftermarket oil filters have problems by either not fitting correctly into the filter housing and allowing the majority of the oil to bypass the filter or the filter media imploding clogging the HPOP side of the system.
Change the coolant at the first 100k miles and 50k miles thereafter using the correct Ford Gold coolant and distilled water.
The only really maintenance intensive item is making sure your batteries stay healthy to protect the FICM in which a damaged FICM will cause all kinds of issues short term and long term.
I did the above items with OCI of 7500 miles, replaced/cleaned the EGR valve a couple of times (another maintenance item) and inspect that the soot build up is dry. During the course of 7 years/170k miles and my truck ran like a top the day I sold it with no engine work, all original injectors still making the same fuel economy since it was new.