6.7 High Output Review, Towing, MPG, DEF Consumption & Thoughts

I have clocked over 20,000 miles on my 2023 F350 Superduty with the 6.7 liter high output diesel and so far things have been pretty good with this truck. I talk MPG, DEF consumption, and my overall thoughts about this truck and how I use it.

[@andrewmartin5531]

Your assessment is worth 10 by so-called reviewers, who don't actually own a truck or tow with one! Well done! Thank you for taking time to share your story.

[@RollingWithRuss]

Thank you! Glad you found it insightful. I enjoy watching truck reviews too but I think “long term” reviews should only be done by people who own them and put real world miles on them. For this reason I am sharing my honest feedback and owner experience.

[@ShannonJanzen]

I agree

[@stevenbrooks1243]

In a crazy tornado 🌪️ my DEF and DPF was blown away

[@RollingWithRuss]

What a tragedy! ;)

[@Captain-Awesome]

Love these trucks. I have a 2024 F350 SRW 6.7 HO Platnium Tremor that we tow a Brinkley Z3610 42’ long and 18k pounds loaded up. I am maxing out the GAWR and Payload. I added air bags that gave the truck a lot more stability. It did make the ride a bit rougher when not towing. I went with the Air Lift LoadLifter 7500XL Air Logic IQ system. I wanted to keep the overload leaf incase something happened to the air bags. In hindsight I would have gone with the ReadyAir system that does remove the overload leaf but is a far better ride when unloaded. At 70-73mph my MPG towing is 8.9 over the last 5,200miles. The Tremor has a 3.55 rear gear and empty I average 15-16. I use the Archoil with fill ups also. I love the turning radius of the F450 but no way I am going to hand wash this thing every few weeks. The single rear week will do just fine 😎. I noticed around 20k miles that the truck began to sound more like a diesel than it did in the previous 0-20k miles. It might have happened slowly, mine sounds the same as yours does. I was curious if you noticed the same thing with yours. I thought maybe it was all in my head or a break-in sound once everything kind of found its break in points. Just more of that clatter with a diesel. I also change the oil at 5k miles and use Schaeffers from all the oil testing I see out there it’s the best by a pretty good margin.

[@RollingWithRuss]

I have noticed a slight change in the sound as the truck gets broken in. It sounds like you have a wonderful truck! I’m glad to hear you’re happy with it. Happy trucking!

[@HerbOMatic]

Power + Right Skip button: hold them down until screen reboots you can reset the infotainment center while driving. Annoying but it freezes sometimes. I have the same truck but in XLT long bed HO. Love it for the most part except it's picked up a few rattles from washboard roads.

[@RollingWithRuss]

Hmm very helpful tip, thank you! I will try that next time it freezes up on me.

[@2500mike]

No to comment bomb today but i think that fuel economy is really good. My setup is a 23 Ram 2500 crew cab 4x4 tradesman so vinyl seats rubber floor covering. 6.4 Hemi and 3.73 gears. I did remove all the plastic trim from the bumpers and took out the active grille shutters. I average about 12mpg empty and 7 ish pulling 10k pounds. That diesel is great compared to that! Lol nice review

[@gardnetbush9768]

I was getting the same as you with the same weight so I had to jump to a Diesel thirty five hundred

[@2500mike]

@@gardnetbush9768 Did you go with a dually or srw and what's the fuel economy like with the Cummins? Newest Cummins I've owned is a 2008.

[@gardnetbush9768]

@2500mike I went with the dually right now it's saying 10 but I only put 3200 miles on it so far I feel it's doing a great job don't feel like the camper back there it's a toy hauler

[@RollingWithRuss]

Yea my father in law has the same truck - 2500 with the 6.4 hemi and tows about 9k travel trailer. He averages about 7-8 towing and about 12 around town mixed driving. In my opinion it’s a wash in money after factoring in resale, fuel mileage, maintenance, etc but it’s really just a different driving experience, more investment up front for the diesel for sure though.

[@BarrySmith-mg3po]

I have a 2023 HO with the 3.31. I hand calculate every tank and DEF fill up. My truck mileage is .6 - .8 mpg off. My mileage pulling my Momentum 351M (16.7K) on a 1200 mile trip 8.9 mpg and 178 mpg DEF consumption. Normally unloaded around town I average 568 mpg of DEF so towing burns it. My 2022 would get over 800 mpg DEF.

[@RollingWithRuss]

That is very interesting. I wonder if the 23+ trucks are programmed for more regens for cleaner emissions?

[@BarrySmith-mg3po]

@@RollingWithRuss The way I understand it, the HO runs hotter therefore putting out more NOx calling for the extra DEF usage. I could be completely wrong. Also I'm sure there are more stringent regulations.

[@Acidrain50001]

I have a 24 F350 Platinum and so far avg 21.8 MPG I use Fuelly app every time I full up and it's only ever off by .4-6 Towing my 8k RV I avg 17 even in the hills of PA and NY it's been great. Now my TDI Jetta says 44 MPG but Fuelly says it's 39 lol. I have used 2.5 Gal of Def in 2500 miles not sure if that's good or not first one with the crap. ( I will hit a pothole and let that crap fall off! ) Now that Engine brake has a damn mind of its own Ram's is far better. When I turn it on I want it on.

[@RollingWithRuss]

Yea I have heard the ram has a better engine brake many times. But any engine brake is better than none at least. That Jetta is a fuel sipper!

[@DS-TRUCKS]

Great review

[@RollingWithRuss]

Thank you!

[@brentwaldrop5610]

You can recalibrate your mpg to reflect your calculations.

[@RollingWithRuss]

Thanks, I wasn’t aware of that but I will look into it.

[@brentwaldrop5610]

@@RollingWithRuss I have a ‘19 and I know you can for it.

[@joshszydel8202]

Thats better than my 22 Ram HO and 23 Duramax. Just pulled a 16k lb processor to texas. 5.5 mpg in the ram and empty 13.5.

[@RollingWithRuss]

Dang, that’s pretty rough. What speed to you usually tow? I know Texas can have some gnarly wind so perhaps that played a factor too…

[@joshszydel8202]

Wisconsin to Texas at 68mph​@@RollingWithRuss

[@jeffclark4008]

Hope you have skid wheels near the back bumper of that Cardinal, that rear tail sits low. Nice truck and trailer. I have a 19 F450 (6 speed) and I'm amazed at the power. I pull a 47' Seismic triple axle Toy hauler. Combined, I'm right at 30k and that truck pulls it so easily. My 17 F350 SRW was amazing too. All 3 make great trucks, comes down to personal preference. I like the looks and performance of all 3 makes.

[@RollingWithRuss]

I actually do not have skid wheels but should think about it as it does sit a little low on the back end. And I would agree with you, they are all nice trucks nowadays. Sounds like you haul pretty heavy! Be safe out there and enjoy!

[@ottyfields]

On my 24 F450 you can delay the backup camera to stay on until you reach a certain mph.

[@RollingWithRuss]

Good to know. Not sure if that solves my complaint but possibly if it stayed on long enough in between reverse and park cycles…

[@aaronstewart8898]

You can turn off the door ding with forscan. I just did it on my 2023. You can also turn off the seatbelt screen.

[@RollingWithRuss]

Thanks for the tip. Might need to invest in forscan.

[@drz400sm5]

Just wear your seat belt. Done.

[@bobbybarnes1652]

FORScan is free. Just need a compatible OBDII dongle.

[@JustAverageJeff]

Try Forscan to disable the door chime. Looking to get DWR version with 4: 10 gearing and 26k miles for 56k to replace my 19 Ranger. Bought 40 acres right outside of Winnemucca.

[@RollingWithRuss]

Sweet man, I think that would be a great truck. We go through Winnemucca quite often and really like it out there.

[@JustAverageJeff]

@ cheapest land I could find on the west coast.

[@texas4325]

Good video!!

[@RollingWithRuss]

Thank you!

[@marcochavanne]

Loving the setup man. I am considering something similar with the shorter box and 3.55s to tow an off grid MDC XT17HRT Family travel trailer. The XL seems to have everything we will need and the XL Offroad Package basically gets you a Poor Man’s Tremor. Not sure if the XLT is worth the extra cash.

[@RollingWithRuss]

That’s what my thought was. You could always swap out the wheels one day and do your own upgrades. For me, the new XLs are like a Lariat of 20 years ago and I didn’t want to spend more just to get luxuries. I am really happy with the XL personally. Sounds like you are looking at a nice rig as well.

[@marcochavanne]

@@RollingWithRuss Exactly. My first truck was my grandfathers 1985 F-150 Lariat. Had cloth seats and was much more spartan than the current trim. I honestly love the steel wheels on the XL and would probably leave those on since you can repair them with a hammer if youre ever in a pinch. Alloys will just break. The mods I was considering were a winch (you can get the factory winch much cheaper online), Katskins heated and cooled seat covers, Morimoto LED projector headlights, Carli lift, and a PTO driven generator for boondocking/off grid camping with the travel trailer. It could also be used as backup power since we live in Texas and our grid is a mouse's fart away from collapse. I honestly think the XL is really a great platform and while it isnt as "turn key" as other trims, I have noticed a lot of guys remove their factory lift, grills, wheels and headlights anyways so its a waste of money in my eyes to get a more expensive model if you plan to modify it anyways.

[@ViperReApErR]

Honestly a dually isn't any harder to park than a cclb anyway, truck is long enough your going to swing wide enough empty to clear the extra width

[@RollingWithRuss]

That’s probably a valid point. Never looked at it quite like that.

[@foreshee10]

Can't go thur most banks with a dually or car washes.

[@ViperReApErR]

@@foreshee10 we have a car wash here that fits duallys just fine

[@colinl9018]

"It is what it is"

[@RollingWithRuss]

Yup - I repeated myself a bit :/

[@jingorat]

everybody hates that door ding.

[@RollingWithRuss]

Apparently Forscan can turn it off but I have yet to purchase it.

[@nicmonson6466]

Put some airbags on it and it will clean up your wind situation

[@RollingWithRuss]

Interesting - does that make it more firm?

[@kevincarter5854]

Does the dually ride worse then the single rear wheel 1 ton ?

[@RollingWithRuss]

It does have one extra leaf spring and two extra tires contacting potholes, bumps etc so I would assume I rides slightly rougher.

[@kevincarter5854]

@RollingWithRuss ok thanks, I rented a single wheel one ton it had a pretty nice ride

[@Jay-gz6mv]

At what weight amount would you get a 350 with the duallies?

[@RollingWithRuss]

I suppose it’s anyone’s best guess. For me weight is just part of the consideration, it’s also how often would I drive in windy areas. Or if I hauled horses or livestock that were moving around in the trailer I would more strongly consider a dually. Right now it would only probably make a small difference, but if I DID go with a larger fifth wheel one day I would certainly upgrade to a dually.

[@TigerFamilyLife]

Hi. What’s the best way to reach to with some questions?

[@RollingWithRuss]

You can email me at [e-mail]

[@JakeScott-ke3sh]

If I were you just prevent oil leaks and it doesn’t void warranty as far as I know, delete the ccv that is connected to your intake

[@RollingWithRuss]

Not sure what you mean here.

[@bryan3975]

You can adjust what the truck is telling you for mileage. Don’t complain if your not willing to adjust it

[@RollingWithRuss]

Good to know. I’m not really complaining, just more curious what the baseline and actual numbers are. The mileage is on par with what I would expect.

[@kevincarter5854]

I changed my oil at 7k , i send my oil in every change for analysis, Blackstone Labs told me i can go at least to 10k, the oil was not breaking down, you are changing it to soon at 5k, however I use the best oil, not sure what your using

[@RollingWithRuss]

I am using the motorcraft synthetic. I can probably extend a bit and plan to go at 7500 intervals next.

[@johnhahn8464]

What brand oil are yiu using?

[@kevincarter5854]

@@johnhahn8464 Schaeffer's in my pickup 5/40 in my Peterbilt/Cummins X-15 .... 10/30

[@donweaver5493]

Spray wd40 on that squeak.

[@RollingWithRuss]

The plastic one?

[@GregoryRendon-l7i]

Hope you don't have cp4 pump injector

[@TonyBenton0728]

It’s a Ford of course it has the CP-4 fuel pump. Not injector ! Only about 6 % in the U.S. fail. If he uses fuel additive’s he should be fine.

[@RollingWithRuss]

Yup - I have the CP4 and I do use fuel additives every tank.

[@rogersavoie4570]

@@TonyBenton0728 I use fuel additives too but just to put my mind at ease I put a S&S bypass system in mine, great unbiased video!

[@mjdgi1]

Delete

[@RollingWithRuss]

Maybe after warranty is up I will.

[@gardnetbush9768]

It is against the law so be careful with deleting it

[@JakeScott-ke3sh]

That thing sounds like a Prius

[@RollingWithRuss]

Sounds fine to me. I like to actually be able to have a conversation on the road with the other people in the truck, not just hear exhaust. Don’t get me wrong, older diesels sound awesome I just don’t need to be reminded 24/7 I am driving one. But to each their own.

[@JakeScott-ke3sh]

@@RollingWithRuss I wasn’t taking a jab lol just a good ole joke 🤣

[@brewswillis7294]

It is what it is… you’re clueless.

[@RollingWithRuss]

Okay? Thanks for insulting me without providing any real feed back. Helps the algorithm nonetheless!

[@johnhahn8464]

​@@RollingWithRussjust don't understand people with their negativity 🙄