One of the most common questions on all of PSN is: “What kind of mileage are you getting?” or “What kind of mileage should I be getting?”
Having seen literally thousands of these on the Nation and the old Ford-Diesel.com, my short answer is “13-16 MPG
Your mileage may vary. What are the variables?
The biggest variable is truck configuration. I’ll post a base configuration and options that add or reduce MPG
. All are going on either my own experiments or the overwhelming majority of posts people have made on the subject.
figures assume an empty truck, driven at the posted limit. One-third city/suburban, one-third, two-lane state roads, one-third Interstate driving. Flat terrain. Year round averages.
7.3, 6.0, 6.4, or 6.7 engine or any Cummins engine in a Ford truck
Super Cab Single Rear Wheel
Open bed, tailgate up
: Subtract 2.0 MPG
Automatic: Subtract 1.0 MPG
Regular Cab: Add 1.0 MPG
Crew Cab: Subtract 1.0 MPG
Big Tires (bigger than 31.7” OD
): Subtract 1.0 MPG
Lift: (3” or greater): Subtract 1.0 MPG
Dual rear wheels: Subtract 1.5 MPG
Open bed, tailgate down: Subtract 1.0 MPG
Flush top cap: subtract 1.0 MPG
Tonneau cover (full length, soft or hard): Add 1.5 MPG
(over open bed)
Aerolid: (very rare): Add 3.0 MPG
(over open bed)
3.55 gears: Add 1.5 MPG
3.08 gears (no longer available): Add 2.5 MPG
4” front/6” rear slam (not available for 4x4
): 1.0 MPG
203 degree stat (7.3 only): Add 0.5 MPG
So, if you have a Ford diesel, SC
, SRW,4x4, automatic, big meats, and a 4”
lift you should expect (18.0-2.0-1.0-1.0-1.0) = 13.0 MPG
Margin of error: Plus or minus 2.0 MPG
There are occasional exceptional trucks. I know a guy in hilly Cincinnati, who drives his SC
,SRW, 6-speed, 4x4
, big tires & 6” lift and a flush cap loaded to the gunwales with work equipment and somehow gets 21 MPG
. No, I don’t know how and neither does he. On the other hand, there is no shortage of guys on this board that get less than 11.0 MPG
Yes, Dodges and Chevy diesel get a little better mileage. They are lighter than the comparable Ford truck and weight matter in MPG
. The very common Fummins conversion gets about the same mileage as the International and Ford diesels.
So, if you get 11 MPG
or less, maybe we can help. If you get over 22, we wanna hear what you’re doing right. But if your 4x4
automatic with the big tires is getting 14, please stow it. We’ve heard it all before.