Fuel mileage 2009 F-450 6.4L
I average 9.3 mpg empty regardless of speed and towing 15,000 lbs it gets 4.5 mpg. HD(?) 16,500 GVW 4.88 gears. Is this normal?
Forum Discussion
The 6.4 responds to deleting better than any other diesel I know of. If I had a 6.4 I’d delete it and expect 20 mpg afterwards.
