2022 f350 6.2 10 speed 3.73 gears, its so thirsty!!
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3rd Gear
Joined: Nov 2025
Posts: 3
Likes: 0
2022 f350 6.2 10 speed 3.73 gears, its so thirsty!!
Hello all, This is my first post on the forum. Im sure its been discussed but would like to ask if anyone has managed to improve the fuel mileage on these trucks. I bought the truck with 40,000KM, and it seems like a decent truck except the fuel usage seems crazy, it gets about 23liters per 100km empty, and goes up to 25liters per100 when pulling my small travel trailer. Why are they so terrible on fuel??
Hoping someone on here has tried something that improves the mileage?
Hoping someone on here has tried something that improves the mileage?
Laughing Gas
Joined: May 2020
Posts: 972
Likes: 452
From: Adirondacks
Hello all, This is my first post on the forum. Im sure its been discussed but would like to ask if anyone has managed to improve the fuel mileage on these trucks. I bought the truck with 40,000KM, and it seems like a decent truck except the fuel usage seems crazy, it gets about 23liters per 100km empty, and goes up to 25liters per100 when pulling my small travel trailer. Why are they so terrible on fuel??
Hoping someone on here has tried something that improves the mileage?
Hoping someone on here has tried something that improves the mileage?
Laughing Gas
Joined: Aug 2021
Posts: 914
Likes: 511
It totally depends on the type of driving you do and how heavy your foot is.
My 2022 (7.3L, 4.30) has a lifetime fuel economy of 11 mpg. I don’t have a heavy foot but most of my driving is around town and these are heavy trucks and it takes a lot of energy to get them moving and slow them down.
Bob
My 2022 (7.3L, 4.30) has a lifetime fuel economy of 11 mpg. I don’t have a heavy foot but most of my driving is around town and these are heavy trucks and it takes a lot of energy to get them moving and slow them down.
Bob
More Turbo
Joined: Feb 2026
Posts: 515
Likes: 101
Hello all, This is my first post on the forum. Im sure its been discussed but would like to ask if anyone has managed to improve the fuel mileage on these trucks. I bought the truck with 40,000KM, and it seems like a decent truck except the fuel usage seems crazy, it gets about 23liters per 100km empty, and goes up to 25liters per100 when pulling my small travel trailer. Why are they so terrible on fuel??
Hoping someone on here has tried something that improves the mileage?
Hoping someone on here has tried something that improves the mileage?
Lead Driver
Joined: Nov 2005
Posts: 8,472
Likes: 4,965
Trending Topics
Laughing Gas
Joined: Dec 2021
Posts: 1,098
Likes: 343
From: PG, BC, Canada
Most people on this forum, I "suspect", no, make that I "know"... would say stuff like...
Slow it down, take it easy on the skinny pedal...
What did you expect, it's a 1 Ton...
You bought the wrong truck if you wanted/expected good gas mileage...
It's just the way it is...
or some smartzass thing like, "the secret to lower fuel usage don't start the engine"...
and... that is why the gasmilage is as "bad" as it is, in these trucks, the F-350 consumer excepts it,.. puts up with it being this way,... Because it's an F-350, so FORD, keeps on providing/making it this way because it's cheaper...
It is NOT that hard to improve the MPG as I have done it , because I care enough So FORD Co. could do it too if they thought they "had" to...
See the improvement in my trucks MPG from stock to now in my sig..below, it's a HUGE improvement. now it wasn't cheap... BUT... worth it IMO, or go here, 6.2L 10 speed gas milage... - Ford Truck Enthusiasts Forums
Slow it down, take it easy on the skinny pedal...
What did you expect, it's a 1 Ton...
You bought the wrong truck if you wanted/expected good gas mileage...
It's just the way it is...
or some smartzass thing like, "the secret to lower fuel usage don't start the engine"...
and... that is why the gasmilage is as "bad" as it is, in these trucks, the F-350 consumer excepts it,.. puts up with it being this way,... Because it's an F-350, so FORD, keeps on providing/making it this way because it's cheaper...
It is NOT that hard to improve the MPG as I have done it , because I care enough So FORD Co. could do it too if they thought they "had" to...
See the improvement in my trucks MPG from stock to now in my sig..below, it's a HUGE improvement. now it wasn't cheap... BUT... worth it IMO, or go here, 6.2L 10 speed gas milage... - Ford Truck Enthusiasts Forums
Last edited by 2021F350; Jun 7, 2026 at 07:27 PM. Reason: add info
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Cargo Master
Joined: Apr 2021
Posts: 2,586
Likes: 1,668
From: NW Wyoming USA
To get the highest mpg run the recommended tire pressure on truck and trailer and drive at lowest possible speed.
My problem is at the recommended tire pressures the ride is harsh and if I don’t run the 70 mph speed limit on two lane highways it pisses everyone off and it creates a traffic hazard.
My problem is at the recommended tire pressures the ride is harsh and if I don’t run the 70 mph speed limit on two lane highways it pisses everyone off and it creates a traffic hazard.
Laughing Gas
Joined: Dec 2021
Posts: 1,098
Likes: 343
From: PG, BC, Canada
To get the highest mpg run the recommended tire pressure on truck and trailer and drive at lowest possible speed.
My problem is at the recommended tire pressures the ride is harsh and if I don’t run the 70 mph speed limit on two lane highways it pisses everyone off and it creates a traffic hazard.
My problem is at the recommended tire pressures the ride is harsh and if I don’t run the 70 mph speed limit on two lane highways it pisses everyone off and it creates a traffic hazard.
Year 4, of my set up I went on a vacation where 73 MPH was the speed limit, instead of the 62 MPH speed limit, and it actually brought down my yearly average MPG by 6.2%... One trip, and the whole years "loaded" average collapsed because of that speed difference.... 
Well that sucked... and it shows how much speed actually does effect the MPG numbers...
Last edited by 2021F350; Jun 7, 2026 at 08:12 PM. Reason: add info
Lead Driver
Joined: May 2011
Posts: 5,790
Likes: 449
You just gotta be happy that the 6.2 has enough power to move the heavy truck at whatever speed you want. Imagine back in the day where 9 or 10 mpg was the norm and the trucks didn't have enough power to maintain speed on hills, empty.
Laughing Gas
Joined: Dec 2021
Posts: 1,098
Likes: 343
From: PG, BC, Canada
Guess what, now I have the best truck I ever had with great MPG too... 
Last edited by 2021F350; Jun 7, 2026 at 08:57 PM.
Trailering
Joined: Feb 2024
Posts: 22
Likes: 11
Guy I just finished a job for has a 22 F350 dually and gets 11.5. He has the 6.2 with the 10 speed. I have a 22 F250 with the 7.3 and the 10 speed and I get 13.5 in town. Just finished a round trip to Texas and back to Illinois and I averaged 17 on the highway. That was average speed of 75 mph.
Laughing Gas
Joined: Dec 2021
Posts: 1,098
Likes: 343
From: PG, BC, Canada
Yes, but putting in "better" oils also helps a lot. IMO