I feel your pain.
Ford went to the 6.4 partly because of new smog regulations. They must have a ton of smog equipment on them.
So far, best mpg empty is 21 mpg. Average towing mpg is 13.1 mpg pulling a 11,000 pound 5th wheel.
Average mpg empty at 70 mph is 18.5 mpg.
All this with 9,395 miles on the odometer.
2006, 6.0, manual trans, 3.73 gears, stock.
Ford went to the 6.4 partly because of new smog regulations. They must have a ton of smog equipment on them.
So far, best mpg empty is 21 mpg. Average towing mpg is 13.1 mpg pulling a 11,000 pound 5th wheel.
Average mpg empty at 70 mph is 18.5 mpg.
All this with 9,395 miles on the odometer.
2006, 6.0, manual trans, 3.73 gears, stock.