it is combined, but a very large percentage of my daily driving is 2 and 4 lane highway. I run it on eco when it is not pulling.

 

Did you run Eco from the beginning or after 1st oil change or?

 

I didn't notice the eco mode till somewhere between the first and second oil changes. 5k on the dot for thoes.

 

Thanks for the info.

 

2023 6.8 gas F250 XL 4x4 crew cab 6.8' bed with STX appearance package. With eco setting I normally sit at 17.5 mpg daily, lots of highway in the daily drive, and I set the cruise to the posted limit. We just took a 10 hour drive from Eastern North Carolina to Clarksville, TN and the truck netted 18.1. We went over the mountains and hit lots of traffic jams a couple of hours before getting in. I love the eco mode. In my experience, it tandems better with cruise control for the best results. I cancel the cruise when coming down big hills so the truck can just glide. If not it will down shift to jeep the speed where I set it. Yesterday we just towed an empty 6 x 12 uhaul from Clarksville to Quincy IL. I tried eco just to see what it looked like vs normal and tow/haul. Eco was 12, normal was 13.7, and tow haul was 12.5. I was going through Illinois during the experiment so the terrain was pretty flat and traffic was not causing issues. Even in St. Louis.

 

15mpg combined. I drive very conservatively

1. 2023 7.3
2. Crew Cab
3. 1,500 miles brand new
4. Auto
5. 4WD
6. Rear gears 3.73
7. Sports Appearance Package
8. Tonneau cover

I take it easy on the interstate

 

426 miles, over 13.5 hours.

Lie-o-meter shows 13.4 mpg, while hand calculated is 13.302 mpg.

I rarely exceed 65 mph so I thought the 4.30 gears would serve me well. I may have been duped by comments posted here, but we shall see.

 

9.9 MPGS Combined, Drive it like i stole it with lots of trips to deer lease towing a SXS or camper going 75-80.

1. 2020
2. Crew Cab
3. 70,000
4. Auto 10 SPD
5. 4WD
6. 4.30
7. 37's, Full Carli Level with Deavers, 5Star Tunes 87-93 Performance, 87 Daily Tow.

My Fuelly Profile for last 50k miles

https://www.fuelly.com/car/ford/f-25...esw004/1099433

 

13.4mpg so far. No, I don't hand calc. This is a 2-ish hour highway trip in the mountains of SWVA @ 72-75mph, and about two weeks of daily driving to work and back. 9 miles each way on the outskirts of the city. 25-45mph speed limits.

2024 F350 4x4
SCLB
1500mi on the ODO
4.30
Tires are 1" larger than stock (currently 275/65/20)
Also have a 2WD front valence on it.

 

12 - 13 mpg combined

1. 2023
2. CCLB
3. 8,600 mi
4. Auto
5. 4WD
6. 4.30
7. Stock wheels/tires
8. No cap/cover
9. N/A

 

9 MPG

2021
E450
38,500
Auto
2 WD
?
Class C motorhome

 

15mpg average
17-21 mpg in eco / flat ground / 55-65
2024
F250
1500 mi
auto 10 speed Torqshift-G
3.73 gears
Fx4
Factory 18" wheels with A/T tires
6.8 v8
(seems to be planted to the road better sense I added a real hub to the passenger side.) Miles per gal seems to be more consistent also.

 

At 55mph RPM shows 1200 in 10th gear

 

My problem is it is almost impossible to drive in Houston or on highways at posted speed limits. Basically speed limits are a floor not a limit. Try driving speed limits, will get run over. My current F150 with 3.5 EB gets around 16+ at up to 90 mph. Highway driving usually at 80+, in Houston absolutely normal to hit 80 every day on beltway 8 and 225. Crazy traffic. When I get my F350 I will try to keep speeds lower but likely will not be very successful. Looking for 12 mpg if I am lucky. But I knew this before ordering the truck. I need the towing capacity the F150 is not made to do. New truck: F350 CCSB, 7.3, 4.30, Tremor.

 

My 2022 F350 DRW with 4.30s will get 12mpg at 80mph with little to no wind.