Long term reliability between the 6.2 and 7.3
Thread Starter
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Trailering
Joined: Sep 2023
Posts: 19
Likes: 2
Long term reliability between the 6.2 and 7.3
Hey all, so im in the market for a newer truck pending a purchase of a camper. Im looking for a 17+ 250 or 350 gas and have found several in my price range. I already know that the 6.2 is as reliable as they come, and definitely am not opposed to getting one,but whats everyone's thoughts on the 7.3 long term and high mileage. I could grab one with 152k on it for a decent price but was wondering if anyone has any input on these motors ar higher mileage? Thanks in advance.
Lead Driver
Joined: Oct 2018
Posts: 7,879
Likes: 2,367
I run diesels myself, but there's an outfit locally that runs 7.3's pulling empty containers over the pass and they have some with a lot of miles on them. they've had virtually no problems with them and they plan to buy more. the fuel milage is comically bad that's the only gripe.
Laughing Gas
Joined: Aug 2021
Posts: 909
Likes: 508
Yup, the lifetime fuel mileage on mine is 11.4 mpg but I do mostly around town driving these days. My ‘22 only has 17k on it so I don’t have much to offer on high mileage.
Bob
Bob
Laughing Gas
Joined: Dec 2021
Posts: 1,091
Likes: 343
From: PG, BC, Canada
My 6.2L has 80,000 miles and has been in a shop once, in the last 5 years, for a leaky rear diff seal... Best truck I ever had except for the stock fuel mileage, which now is respectable, with the things I have done to make it like it should have come from the factory... 
Thread Starter
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Trailering
Joined: Sep 2023
Posts: 19
Likes: 2
Thank you all for the responses, im well aware of the reliability of the 6.2, i have a 2012 with 250k and its been an amazing truck, but sadly rust has gotten the best of it and im soon going to have to part ways with it. I love the 6.2 and how it pulls, i had just seen a lot of posts about how much better the 7.3 was so i figured id ask and get some real world feedback about longevity.
Cargo Master
Joined: Apr 2021
Posts: 2,581
Likes: 1,661
From: NW Wyoming USA
Some 2022 and older 7.3s had lifter failure.
2020-early 2022s 10 speed 10R140 transmissions had a CDF drum with flawed design which could caused shifting issues. The design was changed and went into production sometime during 2021-2022.
2020-early 2022s 10 speed 10R140 transmissions had a CDF drum with flawed design which could caused shifting issues. The design was changed and went into production sometime during 2021-2022.
Last edited by GAZZILLA; May 26, 2026 at 05:57 PM.
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Thread Starter
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Trailering
Joined: Sep 2023
Posts: 19
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So will all this being said, seems ill stick with the 6.2 platform. Any major difference between the 11-16 vs the 17+ other than aluminum body and slight torque bump?
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Cargo Master
Joined: Mar 2010
Posts: 3,331
Likes: 292
From: Laramie, WY
2017+ have a fully boxed frame. F-250 6.2L moved to the 6R100 trans in that year (F-350 kept the 6R140). 2017+ 6.2L also got a torque and power improvement, which includes the IMRC system that infamously clacks/knocks but doesn't seem to actually hurt anything.
Lead Driver
Joined: Jan 2002
Posts: 8,654
Likes: 4,742
From: Itinerant
Hey all, so im in the market for a newer truck pending a purchase of a camper. Im looking for a 17+ 250 or 350 gas and have found several in my price range. I already know that the 6.2 is as reliable as they come, and definitely am not opposed to getting one,but whats everyone's thoughts on the 7.3 long term and high mileage. I could grab one with 152k on it for a decent price but was wondering if anyone has any input on these motors ar higher mileage? Thanks in advance.
Here is my '21' and finishing up a 11 day work week with 250 more miles to finish today. They'll be 263,000 miles on the truck by end of day. Unless something unforseen happens should be near 300,000 by end of year. Normal maintenance, replaced the throttle body around 200k miles. Been a great truck.
If interested.. my maintenance thread in the 7.3 section.
https://www.ford-trucks.com/forums/1...intenance.html
Last edited by scraprat; May 27, 2026 at 05:41 AM.
Cross-Country
Joined: May 2023
Posts: 79
Likes: 20
My 6.2L has 80,000 miles and has been in a shop once, in the last 5 years, for a leaky rear diff seal... Best truck I ever had except for the stock fuel mileage, which now is respectable, with the things I have done to make it like it should have come from the factory...
Thanks
Scott
Laughing Gas
Joined: Dec 2021
Posts: 1,091
Likes: 343
From: PG, BC, Canada
Last edited by 2021F350; May 29, 2026 at 11:43 AM.
Hotshot
Joined: Mar 2017
Posts: 10,163
Likes: 1,373
From: Chaz
Either works for a bed camper. 3.73 and stockish sized tires are fine too for that.
The 2017+ trucks are way ahead of the previous models overall. I wouldnt look at prior to 2017 unless you find a great deal.
The 2017+ trucks are way ahead of the previous models overall. I wouldnt look at prior to 2017 unless you find a great deal.
Fleet Mechanic
Joined: Mar 2021
Posts: 1,650
Likes: 1,332
Had lunch with my brother today.
Lost his 7.3 to lifter failure @ 120,000 miles.
Oil changes between 3500 and 5000 miles.
Has a 2015 6.2 with over a half a million miles on it.
build date November 2022.
Lost his 7.3 to lifter failure @ 120,000 miles.
Oil changes between 3500 and 5000 miles.
Has a 2015 6.2 with over a half a million miles on it.
build date November 2022.
Last edited by Split rims; May 29, 2026 at 06:04 PM.