dsonyay
Full Access Member
Did about 330 miles today in the work truck (F350 6.4PS). I was able to avg 16mpg total. On the way home I was getting nearly 21mpg driving 58 to 60 mph. Not bad!
David
David
making very good mpg
- Thread starter dsonyay
- Start date
powerstrokeguy
Full Access Member
Not bad at all! We need to hear more stories like this! Well hand calculated right?
hdjeff
Full Access Member
I've been talking for over a year about the same, I routinely get 16.5 avg of intown driving, easily make 18+ highway, and have even seen 21.4 hand calculated for long sustained highway driving around 62-65 mph. this is a job 1 truck as well. I was towing my brothers travel trailer about 7500lbs and avg'd 12.5
dsonyay
Full Access Member
No it wasn't hand calculated- I've found the difference in the two to be very minimal- enough so that I can trust the readout to within 3 or 4 tenths. I just turned over 5000 miles yesterday, so I guess the engine has more breaking in to do.
Here's another thing I noticed. If you drive 70mph the mileage drops to 12mpg. The key to good mpg is keeping the rpms under 2000, and/or keeping boost under 10. As long as the tach is under 2ooo rpms the truck does really well on the highway.
I drove about 75 the other day for 100 miles and the mpg was about 11.7. I slowed down to about 63mph for another 150 miles and the mileage jumped to 19mpg
Here's another thing I noticed. If you drive 70mph the mileage drops to 12mpg. The key to good mpg is keeping the rpms under 2000, and/or keeping boost under 10. As long as the tach is under 2ooo rpms the truck does really well on the highway.
I drove about 75 the other day for 100 miles and the mpg was about 11.7. I slowed down to about 63mph for another 150 miles and the mileage jumped to 19mpg
dsonyay
Full Access Member
and keep in mind this is a dually, quadcab, 4.10 lsd, 6.4l automatic.
centexkr
SDD Junior Member
Mines not a daily anymore, since the diesel went up. So
still sitting around 15,000. On the highway, around 65 will do
19. In town and short hops will produce 10. Does good if ya
dont heavy foot these trucks.
still sitting around 15,000. On the highway, around 65 will do
19. In town and short hops will produce 10. Does good if ya
dont heavy foot these trucks.
powerstrokeguy
Full Access Member
Gosh i just cant drive that slow on the highway!! I hate people who drive that slow. Im a 75+ guy. Maybe i shouldnt get a 6.4.
I'm trying to figer this out. I drove to north florida today and was running about 68 mph got 25mpg. Heres what nuts. I had to get back for a emergency and drove back at 80mph and got 26mpg. Yes it's hand calculated I did it three times to check. RPM running at 2500 
