Real World MPG - Heavy Duty Gas Burnner

[DaveC]

Almost all the transmission issues I’ve seen were from the 2020 trucks. The first revision had quite a few teething issues. They’re in the 3rd revision now, and it seems to be a much more solid option. They still haven’t worked out the ignition (coil wire) issues yet.

Good to know, when I picked up my 19' 6.7 in 20 as a leftover model it was pretty much the same price as the 7.3 gasser with the new gadgets and engine. I've often wondered if I should have switched over then. Reading about the above issues is kinda why I stuck with a tried and true (for now).

Great thread.

BTW, some of your gasser MPG's while towing a sxs on a trailer are right there with mine. 10-12. Freaking parachutes.

[WyoBull]

2017 F350 CC short bed 4x4 with the 6.2 gas engine and 3.73 rear end.
Just under 61,000 miles and I hand calculate every tank. Life to date mileage is 12.4 mpg.
I have gotten as high as 17 on the highway and as low as 8.5 carrying my truck camper and pulling my ATV trailer.
Love the truck and the engine.

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[175gr7.62]

There is a guy in Longview with a new 7.3 and he has some sort of hook up with Whipple and was able to get their supercharger kit back in Feb. I saw the dyno sheet on his truck....737ft-lbs and 688 hp on 93. Says he gets 14 on the highway.

[TX03RUBI]

Good to know, when I picked up my 19' 6.7 in 20 as a leftover model it was pretty much the same price as the 7.3 gasser with the new gadgets and engine. I've often wondered if I should have switched over then. Reading about the above issues is kinda why I stuck with a tried and true (for now).

Great thread.

BTW, some of your gasser MPG's while towing a sxs on a trailer are right there with mine. 10-12. Freaking parachutes.

I’m getting better mileage towing my Can Am with the 7.3 than I was with my 17’ 6.7. 11.5 vs 10.5. I’m sure that’ll drop a lot more with heavy weight on it, but so far I’m really pleased with the 7.3.

[sotx]

I get 17-20mpg in my 250 diesel and it only drops to about 14-15 when hauling the horse trailer fully loaded. I have honestly been contemplating going to a gasser on the next one as I don't see enough savings in the diesel (especially when it comes to repairs), but then I know that the diesel motor if properly maintained will be on the road years after that gasser is wore out. I usually get 550K-600K out my diesel motors. That is what makes me think it is wash either way. When my diesel repairs cost me more a month than a new payment it is time to by another one.

Good lord almighty, what year truck, I have never heard of that kind of mileage. My 2017 I get 12 - 14 daily and when I pull my 40' fifth wheel I get 8 - 9.

[Russ79]

Just made a one day trip from Nacogdoches to Dallas and back last week. Mine has a 7.3l and got 15.3- bumped just under 16 but didn't stay there long.

[twistedmidnite]

I have a 2012 fx4 250 with the 6.2. Iv had it for 4 years and never saw over 11. It sits around 9.5 mostly. Bought a 2022 duramax z71 crew srw 1 ton. Got 6500 miles on it and sets around 14 but iv reset it on trips and saw 16 at 75-85mph.

[skeeteroneal]

16 F250 4x4 with 6.2 and 35” wheels. Avg 10.5. 12 on the highway. Towing 9. Mileage sucks but I don’t want to start over on payments. Other than that I like the truck. Does what I need.

[DaveC]

Just made a one day trip from Nacogdoches to Dallas and back last week. Mine has a 7.3l and got 15.3- bumped just under 16 but didn't stay there long.

Best I’ve read of, what gearing and what flavor fuel? (87,89,93- corn free?)


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[DaveC]

I’m getting better mileage towing my Can Am with the 7.3 than I was with my 17’ 6.7. 11.5 vs 10.5. I’m sure that’ll drop a lot more with heavy weight on it, but so far I’m really pleased with the 7.3.

10-4, if someone were to steal my 6.7 tomorrow I’d give the 7.3 a go.



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[stxhunter]

I've got a 2022 F250 Tremor (4:30 is the only option on the 7.3 Tremor). I'm averaging about 13 MPG. This includes my 14 mile round trip to the house and office during the week and a few highway miles on the weekend. I don't see much strictly highway miles but suspect I'd get closer to 14 MPG.

Pulling my 25' travel trailer I'll get 8-9 MPG depending on speed. I've never got a true weight of my trailer, but it's not overly heavy. I think dry weight is only around 5,000 lbs. Truck doesn't really know its back there for the most part.

I’ve got a 20’ 7.3 tremor and get about the same. Best I’ve gotten was a 60mile round trip at 60-65mph, 16.7mpg. Pulling a 6k lb TT at 65 I get around 9.5. There’s a time and a place for the diesel for sure, but doing it strictly for MPG shouldn’t be the reason to get one.