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 > Ford 6.2 gas vs 7.3 gas highway gas milage

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flyte63

Buffalo, NY

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Posted: 01/22/21 01:13pm Link  |  Quote  |  Print  |  Notify Moderator

Anyone have real world HIGHWAY gas milage figures for a Ford Super Duty with about 3000lbs of truck camper in the bed? I’m specifically wondering about 2017-2021 F250 and F350 trucks with the 6.2 gas and new 7.3 gas engines. Reading online I see claims of similar or maybe only 1mpg less with the new 7.3 gas engine, but what about in the real world? (I know they have their place, but not interested Diesel numbers)


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Kayteg1

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Posted: 01/22/21 01:38pm Link  |  Quote  |  Print  |  Notify Moderator

general comment
You should know that weight differences with different load plays minimal role in highway mpg. They do on city driving.
What matters a lot in highway/freeway driving is frontal area and aerodynamics.
Than last comment about gas engine mpg
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mellow

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Posted: 01/22/21 02:29pm Link  |  Quote  |  Print  |  Notify Moderator

According to real world MPG from owners the 7.3 is getting better mpg. I was surprised to see that.

https://www.ford-trucks.com/forums/1614398-updated-7-3-mpg-8.html#post19663873


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Kayteg1

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Posted: 01/22/21 03:52pm Link  |  Quote  |  Print  |  Notify Moderator

I think for real life comparison fuelly.com is the best site, even you will find some reports that are way off the line.
But standard procedure for comparing statistics - you ignore the high and low extremes.
The 7.3l owners report between 10.8 and 12.4 mpg
6.2l reports 9.6 to 12.4mpg
7.3 l is newer engine and expected to have better fuel management.
The above numbers are without explanation what load, so most likely empty truck.
Big camper will cut down 30-40%
We can split hair here, but reading the statistics - the higher mpg are reported by owners with just few fill ups, when those with 30-50 fill ups have it going down.
I would interpret that that new owners drive carefully for some time and lower speeds bring higher mpg. Once they start putting miles on it, they start pushing it and mpg drops.
It is also common that new truck is used for grocery getter and showing off, when aged trucks are getting beaten up with hauling and towing.

Reality Check

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Posted: 01/22/21 06:58pm Link  |  Quote  |  Print  |  Notify Moderator

We have one 6.2... a 2017 4x ext cab, and although it doesn't carry a camper.... it tows a trailer, 26' box (read...wind resistance) which is approx 6000lbs. It gets about 8.1 avg in the mountains. Obviously better on the flats.


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billtex

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Posted: 01/23/21 06:26am Link  |  Quote  |  Print  |  Notify Moderator

We have a new 2020 6.2l with ten speed tranny. Hard to believe but all reports indicate both the 6.2 and 7.3 are getting very similar mpg.
At the time we purchased our truck the 7.3 were very limited in inventory. Don’t know what the supply looks like now.
In any case the 6.2 has been great for us-no complaints.
We haul a 4500# TC or tow up to 12,000#. No problems at all. Very pleased with this truck.
Bill

Edit; I realized I didn’t answer your question. An average weekend trip for us with the TC is ~500 miles. Fuel consumption is ~ 11 mpg. Pretty much what I was getting with the previous diesel. Love the 48 gal tank in this truck. I filled up yesterday and (without TC) have a projected range of > 600 miles.
We have now completed our first full season of hauling the TC or towing the Airstream to all of our usual haunts. Very happy with this truck and the decision to go with gas.

* This post was edited 01/23/21 11:02am by billtex *


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Kayteg1

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Posted: 01/23/21 09:02am Link  |  Quote  |  Print  |  Notify Moderator

Reality Check wrote:

We have one 6.2... a 2017 4x ext cab, and although it doesn't carry a camper.... it tows a trailer, 26' box (read...wind resistance) which is approx 6000lbs. It gets about 8.1 avg in the mountains. Obviously better on the flats.

I have opposite experience. When driving big vehicle in the mountains, driving in 40-50 mph range I am getting very good mpg.
Once I hit flat freeway, the speed goes one way and fuel gauge the opposite.
When I was moving from San Francisco area to Vegas, I made 3 trips with cargo trailer. Going from SF to LV loaded I always had way better mpg, than going back empty, even I always kept my CC at 60 mph. It was all in desert winds.

Grit dog

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Posted: 01/23/21 12:21pm Link  |  Quote  |  Print  |  Notify Moderator

Not surprising that the 2 engines get similar mileage. Especially loaded.
At any rate, the difference between them and the other 2 brands will not be enough to sway a purchase.
It’s uncanny how folks get interested in fuel mileage. Pretty much all newer vehicles of similar size and configuration get about the same mileage.
And with a camper on, a big gasser will get about 8 if you drive it normally, and 1-2mpg better if driving slow, with an egg on the gas pedal.
But then the terrain, weather, altitude and wind will make more difference than the difference between vehicles.


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flyte63

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Posted: 01/24/21 09:43am Link  |  Quote  |  Print  |  Notify Moderator

Thanks for your inputs, I know there are a lot of variables that affect MPG but I was interested to hear about any truck camper experience with the new 7.3 engine. Planning to order a custom build F350 soon and spec’d the way that I want the cost difference in the engines is only $1000. Initially I was scared off from it with it being new and expecting it would have lower MPG, but given that owners are reporting highway milage is basically the same as the old 6.2 I think the 7.3 might be the right choice.

Kayteg1

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Posted: 01/24/21 09:52am Link  |  Quote  |  Print  |  Notify Moderator

New technology brings better stuff those days on daily bases.
I am diesel guy but I see that 6.2l is several years older technology, so you can expect more from newer engine.
Beside heavy vehicles, I drive 2 tons sedan who makes 60 mpg on highway and that's 7 yo technology, when newer engine is not only lighter, but more powerful and 15% more efficient.
Since you are buying new, go for the latest.
You would not buy 5 yo cellphone?
For custom build I strongly advise 360 cameras. I also had ultimate tow package, but that was expensive and did not work with camper skirts.

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