How do you drive 100,000 miles a year. You have to be on the road 24/7.
I know a lady that bought a new 99 powerstroke. She had 800,000 on it last I heard. Said she changed the oil once a week. Drove from Phx to somewhere in the Midwest and back every week and pulled a trailer full of small pets!
My F250 only have 260,000. Runs great but I want a new truck.