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The days of "hoping" that an engine will make it to 100K miles are long over. I'm not sure how long it will last, but I would say that 100K is nothing to be afraid of. All modern engines, gas and diesel, last much longer than they used to. I think a lot of this has to do not only with engine design, but the engineering of modern oils. I doubt that most V10's that make it to 200K run "like new," but 200K is certianly not out of the question.
The work truck I use to drive had 115,000 miles on it and was still running well. It did use a bit of oil but did not smoke or leak so I don't know where it was going, but the work truck was not taken care of at all. The would only change the oil about every 10 or 12 thousand miles. The engine seemed to be able to rev up like a rice burner. Maybe thats where the horespower comes from.
A Company that I do business with has some Shuttle Bus's E-450 Super Duty's (28 passenger buses) that are run daily on long runs doing tours.
One of there shuttle buses is a 1999 model and it has 317,000 miles
I know it has had work done to it such as transmission rebuilt, water pump, alternators, but as far as the basic engine itself, it has not been rebuilt. I know they use premium gas in there engines for better performance and better fuel economy. Most of the miles are highway miles.
Jeff
2000 Ford F350 Stakebody Dump V10, not sure what rear is in it.
After I had the motor replaced the truck was still running like crap. The mechanic tracked everything back to the computer. They looked for a new computer and not one dealership in the entire continental United States had one.