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Fuel Economy

 
  #1  
Old 07-19-2017, 09:04 PM
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Fuel Economy

My 2016 F-350 6.7 Powerstroke 3.55 rear axle, now has 22,000+ miles so I am guessing it is now loosened up and getting the best fuel economy it will ever get. So here are the numbers:

Running empty, Highway: 18.5 to 21
City driving, stop & go: 14.2 to 15.6
Hauling my fiver (13,000+ Lbs.) 9.5 to 10.5 (a bit better if I keep it under 65mph)
Of course all the power I need at any time.

Just curious what other 6.7 owners are getting
 
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Old 07-20-2017, 05:32 AM
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I can get similar but slightly less mileage with my F350 DRW with 3.73 gears. IT did seem to get better with the latest ECU/PCM TSB calibration and once i got past 10K-15K miles.
 
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Old 07-20-2017, 06:46 AM
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I see very similar empty mileage with 3.31 gears. Can't quite compare towing though since I don't pull a 5ver. Dump trailer weighing in at 15K+ I still get around 11-12. If I bumper pull the TT with 2 ATV's in the bed of the truck (on an ATV rack) I'm around 12-13 on the highway at 65 mph. That's about the biggest wind brick I have to try and compare to a 5ver. Got 3 different cargo trailers of different sizes, those vary a bit in mileage depending on what's in there, but nothing I tow pulls me below 11 mpg.

Currently sitting around 45K miles and counting.
 
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Old 07-20-2017, 07:54 AM
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I'm at 64k with my 6.7. This truck is my daily driver with 70 miles in rush hour, stop and go traffic I normally get 15+. Highway I'm about the same as you and towing my 5th wheel I'm at @10+ but its all on Florida flatlands.
I had reset the Trip B odometer very early and have not touched it for almost the life of the truck. I says I am averaging 15.4 all together but when I check the mpg tank to tank I have noticed some significant variance to actual.
I think that 22k is still pretty young in the life of the 6.7 so you may see some changes.
 
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Old 07-20-2017, 08:02 AM
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Originally Posted by rdlouks View Post
My 2016 F-350 6.7 Powerstroke 3.55 rear axle, now has 22,000+ miles so I am guessing it is now loosened up and getting the best fuel economy it will ever get. So here are the numbers:

Running empty, Highway: 18.5 to 21
City driving, stop & go: 14.2 to 15.6
Hauling my fiver (13,000+ Lbs.) 9.5 to 10.5 (a bit better if I keep it under 65mph)
Of course all the power I need at any time.

Just curious what other 6.7 owners are getting
My '12 with 3.31 gears is quite similar. Unloaded about 20-20.5mpg (my best was 21.8mpg display and 20.6mpg calculated over 650 miles). City stop and go about 16mpg. Pulling my 9000 lbs TT about 11-11.5, but wind and speed here are very big factors, as you know. 👍
 
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Old 07-20-2017, 09:03 AM
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I don't think it changes as the engine wears in, so to speak. Maybe it used to 20 years ago but if anything, mine burns more fuel now than it did when it was new. I just drove 1300 miles this week, all interstate without a trailer. Averaged 17.8. When I tow I get 9. I've got 170,000 miles on it.
 
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Old 07-20-2017, 09:08 AM
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Originally Posted by rdlouks View Post
Running empty, Highway: 18.5 to 21
City driving, stop & go: 14.2 to 15.6

Just curious what other 6.7 owners are getting
I get about the same. Maybe slightly less on the highway MPG, especially when the wind is up. 17.0 to 20 on the highway for me. I mostly drive 78 mph on the highway and that doesn't help either but I don't drive a huge truck expecting to get great mileage either.

bruce....
 
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Old 07-20-2017, 09:21 AM
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Originally Posted by ssunit1 View Post
I'm at 64k with my 6.7. This truck is my daily driver with 70 miles in rush hour, stop and go traffic I normally get 15+. Highway I'm about the same as you and towing my 5th wheel I'm at @10+ but its all on Florida flatlands.
I had reset the Trip B odometer very early and have not touched it for almost the life of the truck. I says I am averaging 15.4 all together but when I check the mpg tank to tank I have noticed some significant variance to actual.
I think that 22k is still pretty young in the life of the 6.7 so you may see some changes.
Just checked my "A" trip-meter that I have never reset and it shows average MPG at 14.5. Coupled with the fact that I have all the power I will ever require, Not complaining a bit.
 
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Old 07-20-2017, 09:38 AM
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With the 3.31 gears, I think I am just about 1/2 mpg higher on the freeway, but the same on in town driving. My best ever was HWY 22.1.

I tow an 8,000lbs travel trailer, and that 65 is indeed the magical number. At even 67 I can muster 12.5mpg, but as I creep closer to 70 is really starts to take a nose dive. If I set the cruise at 75 I'm down to 9.5mpg.
 
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Old 07-20-2017, 10:50 AM
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I am the same towing app. 14k but empty I max at about 16 mpg however if your much under 80 around here you get run over. That of course if and when the freeway is flowing. Lifetime mpg at app 17,000 miles is 12.9. my truck is 4 X 4 CC long bed with 3.55 *** end.
 
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Old 07-20-2017, 10:54 AM
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Running empty, Highway: 14 to 17
City driving, stop & go: 11 to 12
Hauling camper/boat/horses (6k - 10k Lbs.) 7 to 9
Need more power when fully loaded
Very happy with my truck
Most my miles are tow/haul or city. Over all I get about 10.5 to 11
I drive fast and highways are not flat.


For comparison purposes, my Cobra gets 12 and my 72 250 about 9. The 6.7 gets the most mpg/per pound.
 
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Old 07-20-2017, 09:39 PM
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Wow...these are some numbers I can live with. I'm new with only just over 10k miles. I have the 3.55s and with around 50/50 city highway, I'm around 14 to close to 16 mpg. I haven't taken a real long road trip yet, but my son and I are going on our annual trip to see his godfather in Lexington, KY. I'm hoping for 18 mpg on the highway. We shall see.
 
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Old 07-21-2017, 06:33 AM
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Originally Posted by Overkill2 View Post
Wow...these are some numbers I can live with. I'm new with only just over 10k miles. I have the 3.55s and with around 50/50 city highway, I'm around 14 to close to 16 mpg. I haven't taken a real long road trip yet, but my son and I are going on our annual trip to see his godfather in Lexington, KY. I'm hoping for 18 mpg on the highway. We shall see.
For my truck to get 18 it would probably be 45 to 55 mph for about a 100 miles. Never gonna happen.
 
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Old 07-21-2017, 07:01 AM
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Originally Posted by 69cj View Post
For my truck to get 18 it would probably be 45 to 55 mph for about a 100 miles. Never gonna happen.

So these other guys are lying? Just wondering...


I talked to a guy in my area who deleted his 11 and he told me he was getting 18 -19 mpg highway before delete.


I run the numbers and don't use the truck mpg.
 
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Old 07-21-2017, 09:03 AM
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Originally Posted by Overkill2 View Post
So these other guys are lying? Just wondering...


I talked to a guy in my area who deleted his 11 and he told me he was getting 18 -19 mpg highway before delete.


I run the numbers and don't use the truck mpg.
You'll get over 18, no worries. I get the same mileage as the OP.
 

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