Forum Discussion
stickdog
Nov 02, 2013Explorer
The 6.4 is not noted for fuel efficiency. The 350 would have 3.73 diff and the 450 would be 4.30. I'm pulling 15,000 with TV in sig and would be happy if I averaged 9 mpg. I do feel there is a difference in fuel quality which also affects mpg besides the wind smoothness of the road and terrain.
There is also the problem with fuel availability as the 6.4 is only cleared for 5% bio and in some areas the fuel stations all have up to 20% bio stickers on their pumps.
I would love to trade my 09 6.4 for the newer 6.7 just to avoid problems with bio-fuel.
I have had 10 mpg on occasion flat ground good road and 55 mph, hasn't happened too often.
There is also the problem with fuel availability as the 6.4 is only cleared for 5% bio and in some areas the fuel stations all have up to 20% bio stickers on their pumps.
I would love to trade my 09 6.4 for the newer 6.7 just to avoid problems with bio-fuel.
I have had 10 mpg on occasion flat ground good road and 55 mph, hasn't happened too often.
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