Thats still pretty amazing to see that motor with 390K+ on it and in that good of shape. Alot of people still don't realize how simple maintenance can prevent alot of problems.
One of our ford techs I work with recently had a 07 F150 (gasoline) with around 50k miles on it and it looked way worse than that. Gunk built up everywhere. That motor will be lucky to hit 100k. Looked like they had done at most 5 oil changes, if that. I see this all the time, sad to see people just trashing their motors and then wondering why their motor failed.
One of our ford techs I work with recently had a 07 F150 (gasoline) with around 50k miles on it and it looked way worse than that. Gunk built up everywhere. That motor will be lucky to hit 100k. Looked like they had done at most 5 oil changes, if that. I see this all the time, sad to see people just trashing their motors and then wondering why their motor failed.