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View Full Version : 6.7 fuel mileage


kenscomet
10-16-2013, 07:16 PM
Looking at the f350 with 6.7, 2 wheel drive, dulle. Wanting to know what kind of mileage are you getting towing and not towing

travlingman
10-19-2013, 10:53 PM
Looking at the f350 with 7.3, 2 wheel drive, dulle. Wanting to know what kind of mileage are you getting towing and not towing

You say in post you are looking at a 7.3 engine, but in title you say 6.7. Which do you want to know about?

kenscomet
10-21-2013, 10:49 PM
change it to 6.7 sorry about that

travlingman
10-26-2013, 04:22 PM
I have 4 wd dually cc and get 16+ around town, 11 towing 14.5k fiver. On highway see 18-19 depending on speed.

mikey4813
11-16-2014, 10:46 AM
Looking at the f350 with 6.7, 2 wheel drive, dulle. Wanting to know what kind of mileage are you getting towing and not towing

We have a '13 F350, 6.7 PSD, Lariat CC 4x2 DRW with 17K miles so far, pulling a 16.3K 5th and get 12.8 MPG @ 63 MPH but its still in the break-in phase.

Why 63 MPH? Almost all trailer tiresare only rated by mfg to 65 MPH!

Maintain it well, travel safe & enjoy the journey!

mikey4813
05-17-2015, 03:27 PM
We tow a 16400 GVWR fiver with a TWD F350 with your 6.7. We consistenty get 11.6-7 MPG at 63 MPH. We have the 6 -spd auto & 373 gears with DRW.

Truck works well, up or downhill, no problems noted over the last 40K miles.

retired in utah
05-19-2015, 09:41 PM
My 2011 Ford dually gets similar results to the above. 11.6 towing over fairly level ground, 9 in the mountains, 16.7 general driving, and 20-21 on the interstates when not towing.

mikey4813
05-19-2015, 09:59 PM
moral to that story: You won't win any races so why try?

stanleyz
05-31-2015, 07:57 AM
I have a 6.7, had a 6.4 before that and a 7.3 before that. The only one that gave any decent mileage was the 7.3. Any diesel built after the 2007 model year is equipped with a DPF which pretty much renders if incapable of getting good mileage. (to y'all who are gonna tell me about delete and tune I know all about it)

I suspect most of the numbers above are from the computer readout and I doubt they are pin point accurate. So here is my suggestion to help you enjoy your new 65,000 dollar truck.

Get an auxiliary fuel tank so you don't have to refuel twice daily

When refueling, once the nozzle is in the tank access never never look at the numbers on the pump.

When finished filling both tanks tear off the receipt and never never look at it, just hand it to the book keeper and get in and drive.

Enjoy your truck. Oh yeah, get the 4 wheel drive. It's like insurance, when you need it you really really need it and would pay what it costs in a new York minute.

SlowNnice
06-02-2015, 07:40 PM
Stanley, Well said. I don't have a computer on my rig (6.7 2014 King Ranch Dually 4x4, 8 ft bed) and get around 9 towing my 43 footer and 13.5 to 14 mpg when not towing. I still love my truck, but don't baby the gas pedal too much.

I never thought for a minute I was getting a fuel saver. But man does it pull sweet.

wingnut60
06-02-2015, 10:28 PM
SlowNnice,
With the '14KR, you have the computer...
Joe

Davidg
01-01-2016, 11:36 PM
I'm on my second 6.7. Stanley, you are absolutely correct about 4 wheel drive. I'm towing approx 13,000 and get 10-11 towing, 15-16 around town, and 20-21 interstate. I topped off today, and hand calculated at 15.9 around town. But dang does that sucker pull strong.

JEFF69Z28
01-04-2016, 01:19 PM
I'm on my second 6.7. Stanley, you are absolutely correct about 4 wheel drive. I'm towing approx 13,000 and get 10-11 towing, 15-16 around town, and 20-21 interstate. I topped off today, and hand calculated at 15.9 around town. But dang does that sucker pull strong.
No way your getting 20-21mpg,I dont get that and I have no dpf or cat.but i do have a cai and tune put in it,6.4 2008.:)

Davidg
01-05-2016, 07:38 AM
Jeff, your challenge to my mpg numbers caused me to go back and read my post again....sure seems to be clear to me. I will assume that you mis-read my post.
Here's my numbers again; Towing I get 10-11 mpg, Not towing I get 15-16 city, and Not towing I get 20-21 highway. Hopefully, this clarification will make you feel better, but these numbers are in fact hand calculated, and correct whether you agree or not.
Happy New Year everyone
David

JEFF69Z28
01-05-2016, 09:13 AM
jeff, your challenge to my mpg numbers caused me to go back and read my post again....sure seems to be clear to me. I will assume that you mis-read my post.
Here's my numbers again; towing i get 10-11 mpg, not towing i get 15-16 city, and not towing i get 20-21 highway. Hopefully, this clarification will make you feel better, but these numbers are in fact hand calculated, and correct whether you agree or not.
Happy new year everyone
david
yeah right!:d

Davidg
01-05-2016, 12:41 PM
I would suggest you go back to the beginning of this thread. Check the fuel mileage on other 6.7 engines in trucks with single rear wheels. Check other Ford diesel forums. You might learn something. Comparing the 6.7 to the 6.4 is just ignorant. Plus consider driving habits. The fact that you have a tuner suggests to me that you may have a heavy right foot. I'm just an old grandpa, and I drive like one, therefore, I get great fuel mileage. Have a nice day sport.

wingnut60
01-06-2016, 10:38 PM
Davidg,
Having had 2 6.4s, and yep, mileage in the 10-11 in town and 13-14 on hiway, with tuner and full delete.
I can only wish for your type mileage, and the money to buy a new '15/'16. Ford has a great engine now, they just need to concentrate on the fuel/water separator situation.
I'm a g-greatgrandpa, don't baby it and love the power. And love the price of diesel.
Joe

Davidg
01-07-2016, 07:08 AM
Hello Joe; Yep, the 6.4 was a better engine than the 6.0, except the fuel mileage was not great. I've been told that once it's been deleted and tuned, the mileage comes up nicely and the power is phenomenal and maybe even better than the 6.7.
I'm very happy with the power and fuel economy of my 6.7. Prior to this F350 with 3.55 axles, I had an F250 with 3.31 axles. When I drove the truck like grandpa, it would return 23 mpg or better, however the towing mileage was about the same.

GlennWest
01-07-2016, 03:18 PM
If you are buying a truck and concerned about fuel mileage maybe you don't need a diesel truck. How safely and capable of towing my loads with comfort would be my concern. mpg is just numbers.

Davidg
01-07-2016, 04:21 PM
That's absolutely correct Glenn. I made my choice based on 1. Reliability, 2. Towing ability, and 3. Comfort/features. Notice that MPG is not on that list? Having said that, however, there's no reason that we cannot discuss fuel economy at the same time that we discuss other aspects of our tow rigs. I enjoy most discussions of our fivers and the rigs we tow them with. What I do not care for is being called a liar when I make a statement concerning my rig. I'm to old to be spewing BS. I'm interested in everyone's opinions, and we can disagree on things, but we can still be respectful. Once someone becomes disrespectful, I lose patience quickly.
The previous was not directed at you Glenn....I'm just venting a little. Have a good day.

Davidg
01-07-2016, 04:23 PM
Glenn, what kind of pipe do you weld? Plant turnarounds? Or cross country pipe lays?

GlennWest
01-07-2016, 04:26 PM
Mostly turnarounds. We also do some new construction. We "bail out" others.

Davidg
01-07-2016, 07:43 PM
I spent a few years in the pipeline business, and several years doing pipeline construction. Different location, but similar standards. We tested to 1104.

Davidg
01-07-2016, 07:54 PM
Davidg,
Having had 2 6.4s, and yep, mileage in the 10-11 in town and 13-14 on hiway, with tuner and full delete.
I can only wish for your type mileage, and the money to buy a new '15/'16. Ford has a great engine now, they just need to concentrate on the fuel/water separator situation.
I'm a g-greatgrandpa, don't baby it and love the power. And love the price of diesel.
Joe

Joe, I've heard a little chatter recently about fuel filtration on the 6.7. I guess it's especially crucial for this engine due to the expensive hpfp. What are folks doing in an effort to protect those critical components, and what are the real shortcomings of Fords system? I drain the fuel filter into a pint mason jar, let it sit overnight, and check it the next day. I have found no water nor any particulates in this fuel....ever. I realize that it only takes one time though. I think Dieselsite has an integral fuel filter, but they are proud of that puppy. ($700). Of course $700 might look cheap if one was presented with a bad hpfp and Ford nor the fuel source will own the problem.
I dunno, but I've been thinking about this lately, and I had wanted to pick your brain a little when you first mentioned it.

Thoughts?

wingnut60
01-09-2016, 11:22 AM
David,
I have been giving a lot of thought to this--tho I don't have a newer engine, still worried about this vulnerability with the Ford diesels--particularly the fact that Ford continues to produce an engine that is sensitive to water contaminated fuel, but does not provide a system to sufficiently protect against it, then won't warranty when the HPFP grenades due to "water-in-fuel."
Yes, the Dieselsite unit looks good, also Fass/Airdog make separator units and others. Setting one up is my hangup, but will probably get my diesel shop to do it before long, as I do use an in-bed aux tank. Having said all this--I have a total of over 450000 miles on 6.0 and 6.4 engines without WIF failures, so I really have no personal reason to badmouth Ford over this particular situation--I did lose an engine over a rocker arm failure (another concern with the 6.4s) with my first 6.4 at 207k miles.
If I did not keep up with the Ford diesel forums, I would not be aware of any of this and would go about my merry way oblivious of the fact my engine might get some water in the fuel system...
Still a Ford guy, tho...

PM sent

Joe

Davidg
01-09-2016, 01:50 PM
Hey Joe, good information.
The reviews I've read on the FAS haven't been to good. Not sure about the Airdog. The unit from DieselSite have been favorable. It just bugs me to think I need to spend $700+ dollars to obtain the correct filtration. But we'll see. I'll study on it a while and continue to read up on the different aftermarket filters. My old company had special paper filters built that absorbed water, and would ultimately just shut down flow once their water retaining capacity had been reached, but zero water was allowed downstream of the filter. It wouldn't be expensive to install these type of stacked disc filters, and have a bypass filter to get you home or to dealer. But I suppose if this cost an extra $100, someone at Ford might think that would make them less competitive with the other two. Anyway, interesting discussion.

oldbird
01-18-2016, 11:59 AM
Here is one most haven't heard before. My wife gets a headache from the electronics on the newer trucks. I use a internet satellite to 'try' to avoid wifi and leave my cell phone off most of the time. She can be in the bedroom with the door closed and I'll turn on my cell to check email or whatever and she will yell at me thru the door, without looking, to shut off my cell. Made a believer out of me.

No, I'm not off topic, I love my 7.3!! :)

wingnut60
01-18-2016, 10:08 PM
oldbird,
That is a tough deal, indeed.

davidg,
You don't want anything that cuts off fuel to the HPFP, bad deal. Running a 6.4/6.7 out of fuel can be way worse than just a priming problem, so I hear.
Joe