Mpg
Cargo Master
Joined: Jul 2006
Posts: 2,756
Likes: 38
From: Nampa, ID
Before the instrument cluster issues became severe, my 4.10:1 open differential with the E4OD averages 18.5 MPG unloaded. I get about 12 - 14 MPG loaded/towing the travel trailer. I think those numbers might be a little higher, but it's difficult to calculate when the odometer blinks off and back on. When it comes back on, the mileage accrued is less than what it was before it blinked out.
Junior User
Joined: Jan 2016
Posts: 73
Likes: 0
From: Tulsa, Oklahoma
On a run to Oklahoma City last night to watch my grandson wrestle in regionals, I got 13mpg in stock mode, running at a constant 65mph unloaded. I was a little disappointed but oh well, it's not a compact.
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Logistics Pro
Joined: Dec 2005
Posts: 4,644
Likes: 55
From: Moro Bay, AR
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Fleet Mechanic
Joined: Nov 2006
Posts: 1,950
Likes: 1
From: Knoxville, TN
There are only 22 f-350's with 7.3's in the list below, but it is a pretty good tool.
Ford F-350 Mileage | Fuelly=
Senior User
Joined: May 2013
Posts: 208
Likes: 0
I have a '96 automatic F250 with a 3.55 differential and factory-sized 23585R16 tires. Through the past 20 years of ownership, I found I can depend on the following:
23 mpg @ 55 mph
21 mpg @ 70 mph
14 mpg towing a travel trailer @ 60 mph
23 mpg @ 55 mph
21 mpg @ 70 mph
14 mpg towing a travel trailer @ 60 mph