MPG
Cargo Master
Joined: Jan 2015
Posts: 2,824
Likes: 39
From: Boise
Here is one of the threads I was a part of, I think there were others.
https://www.ford-trucks.com/forums/1...0-7-3-a-4.html
https://www.ford-trucks.com/forums/1...0-7-3-a-4.html
Cargo Master
Joined: Apr 2021
Posts: 2,572
Likes: 1,655
From: Bighorn Basin, NW Wyoming
Yes, the dead pedal sucks big time. I reduced the deadness with a Soler throttle controller which helped a lot.
Fleet Mechanic
Joined: Jul 2008
Posts: 1,937
Likes: 1,221
From: Southern Crescent
There's more to it than gas mileage, which the 7.3L and an adult driver will win by just a little bit every time. That 1 MPG may not be much to others, but at 30 gallons per fill up (35 gallon tank) that's 30 free miles, which saves me about $10 per tank per fill up at todays prices. That little savings does matter, as people will drive to the station across the street for 10 cents a gallon savings. 
But before you decide, go watch some You Tubes about changing 16 spark plugs on a 6.2 and if after that, you still want one, order now cause the wait times are not getting any shorter. But I suspect you'll come away wanting the much easier to maintain 7.3
But before you decide, go watch some You Tubes about changing 16 spark plugs on a 6.2 and if after that, you still want one, order now cause the wait times are not getting any shorter. But I suspect you'll come away wanting the much easier to maintain 7.3
Cargo Master
Joined: Apr 2021
Posts: 2,572
Likes: 1,655
From: Bighorn Basin, NW Wyoming
There's more to it than gas mileage, which the 7.3L and an adult driver will win by just a little bit every time. That 1 MPG may not be much to others, but at 30 gallons per fill up (35 gallon tank) that's 30 free miles, which saves me about $10 per tank per fill up at todays prices. That little savings does matter, as people will drive to the station across the street for 10 cents a gallon savings.
But before you decide, go watch some You Tubes about changing 16 spark plugs on a 6.2 and if after that, you still want one, order now cause the wait times are not getting any shorter. But I suspect you'll come away wanting the much easier to maintain 7.3
But before you decide, go watch some You Tubes about changing 16 spark plugs on a 6.2 and if after that, you still want one, order now cause the wait times are not getting any shorter. But I suspect you'll come away wanting the much easier to maintain 7.3
Freshman User
Joined: Nov 2018
Posts: 34
Likes: 11
I know most people will hate this response but your MPG is all about your driving style. I get 18-19 on my ‘19 6.7 consistently. I had a trip last summer that was all back roads between 45-50 mph and I was close to 23mpg. I did a lot of research on the rear end gear ratio before buying mine and there is less than 1mpg difference from the stock gear to a 3.73.
Laughing Gas
Joined: Dec 2005
Posts: 1,087
Likes: 189
From: Reno, NV
My 2022 F250 4x4 STX with 3.73's gets 13.5 mpg in mixed driving, about 8 mpg towing a 7k enclosed trailer.
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Fleet Mechanic
Joined: Dec 2021
Posts: 1,735
Likes: 1,116
Both engines get the same mileage. Ive spent plenty of time with both engines in identical trucks (F350 XL RCLB 4x4) and they operate very similar of each other with very minor difference.
More Turbo
Joined: Mar 2022
Posts: 576
Likes: 169
On my way home from IA picking up my truck I got up to 14.4 mpg. Yesterday we drove about 2.5 hours each way to a college in IL. Going there I got about 14.3 cruising at 75.
While at the college I topped off with 90 octane ethanol free gas. My mileage dropped to 13.2'ish driving at the same speed. No wind to speak of. I was assuming I would get better mileage with the ethanol free gas but I was wrong.
Now, it could be the station pump said ethanol free 90 but maybe it wasn't. I'll never know. I'm going to try my experiment again with ethanol free 90 from the airport once I run this tank low.
While at the college I topped off with 90 octane ethanol free gas. My mileage dropped to 13.2'ish driving at the same speed. No wind to speak of. I was assuming I would get better mileage with the ethanol free gas but I was wrong.
Now, it could be the station pump said ethanol free 90 but maybe it wasn't. I'll never know. I'm going to try my experiment again with ethanol free 90 from the airport once I run this tank low.
Cargo Master
Joined: Jul 2021
Posts: 2,969
Likes: 2,407
From: Ridgway, CO
On my way home from IA picking up my truck I got up to 14.4 mpg. Yesterday we drove about 2.5 hours each way to a college in IL. Going there I got about 14.3 cruising at 75.
While at the college I topped off with 90 octane ethanol free gas. My mileage dropped to 13.2'ish driving at the same speed. No wind to speak of. I was assuming I would get better mileage with the ethanol free gas but I was wrong.
Now, it could be the station pump said ethanol free 90 but maybe it wasn't. I'll never know. I'm going to try my experiment again with ethanol free 90 from the airport once I run this tank low.
While at the college I topped off with 90 octane ethanol free gas. My mileage dropped to 13.2'ish driving at the same speed. No wind to speak of. I was assuming I would get better mileage with the ethanol free gas but I was wrong.
Now, it could be the station pump said ethanol free 90 but maybe it wasn't. I'll never know. I'm going to try my experiment again with ethanol free 90 from the airport once I run this tank low.
More Turbo
Joined: Mar 2022
Posts: 576
Likes: 169
Did you check to see if it was delivered with the front hubs locked? Many are, mine was. I discovered it 300 miles from the dealer on my way home. Mileage was around 13.5 mpg running 80 mph. Unlocking the hubs to "auto" gained me 2 mpg and I did 15-16 at 80 mph after that.