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
I had a 2010 F350 King Ranch 4x4 with a 6.4. 3.55 gears. Ugh. Not towing, around town 11-12, highway maybe 14-15. Not much different than the GMT800 6.0 gas LQ4 truck it replaced. It regened every 50-100 miles, and got that "Drive to Clean Exhaust Filter" all the time too, despite a fair amount of hour+ highway trips.
The truck also had $20k+ in warranty work in 18 months. It had some kind of drivetrain issue (I suspected torque converter clutch) where it would have a loss of drive on a 5-4 downshift under load after getting good and warm. Lift and force the upshift back to 5th and it would go, but not after almost getting run over a few times and having to dive back into the slow lane. Then there was the overfuel/overboost it would do while in regen. 35psi and all the extra fuel. No wonder it melted two pistons at 24k miles, necessitating a new short block. Since it spent 3 months of that 18 months in the shop, it qualified for Lemon Law status in my state and Ford bought it back.
The replacement '11 6.7 was way more stout and perfectly reliable, but it got traded at 5 years and 60k miles with the powertrain warranty was up, after that 6.4 experience. Also, not really interested in owning another diesel truck either with what that 6.4 put me through, even with the decent 6.7.
The truck also had $20k+ in warranty work in 18 months. It had some kind of drivetrain issue (I suspected torque converter clutch) where it would have a loss of drive on a 5-4 downshift under load after getting good and warm. Lift and force the upshift back to 5th and it would go, but not after almost getting run over a few times and having to dive back into the slow lane. Then there was the overfuel/overboost it would do while in regen. 35psi and all the extra fuel. No wonder it melted two pistons at 24k miles, necessitating a new short block. Since it spent 3 months of that 18 months in the shop, it qualified for Lemon Law status in my state and Ford bought it back.
The replacement '11 6.7 was way more stout and perfectly reliable, but it got traded at 5 years and 60k miles with the powertrain warranty was up, after that 6.4 experience. Also, not really interested in owning another diesel truck either with what that 6.4 put me through, even with the decent 6.7.
