2004 Ford F-250 Super Duty 4dr SuperCab Lariat 4WD LB (5.4L 8cyl 6M)
We lived at 8500' elev. when I bought the this truck w/6.0 Diesel. It produces a lot of power at hi elevation. Easily hauls a 3 ton Bobcat on utility trailer up hill. The injectors are sensitive to dirty oil and fuel. Had to replace injectors after ruining them with biodiesel extended oil changes. Upgraded to Elite Diesel Stage 1 inj and new flash. Now change oil every 3000 mi or less, use Seafoam fuel treatment, and engine is much happier. Burnt up one alternator at 84,000 miles. Replaced it myself in 10 minutes for $200. No other repair problems. Mileage around town is 16-17 mpg. Highway is 22-26 and truck is comfortable on long trips.
Power and fuel economy. Hi revving motor and 5/6spd auto trans gets this puppy moving.
Make motor more tolerant of poor fuel and dirty oil. Fuel additives, 16qt oil changes and $30 filters hit the wallet hard. Will be interesting to see if Ford's new 6.7 will be any better than the Navistar it replaces.