What Is The Fuel Mileage For a 6.7 Powerstroke? (Average)

When you are towing a heavy travel trailer or 5th wheel you want a lot of power under the hood of your tow vehicle. Ford has heard those concerns and has created a new motor to help you get to your destination with the power you need.

What Is The Fuel Mileage For a 6.7 Powerstroke? It is possible to get between 9 and 30 mpg depending on your driving habits, terrain, and tow load. The average mpg that 6.7 owners have been reporting is 18 on the highway and only a little drop in the city.

To learn more about the 6.7 Powerstroke engine just continue to read our article. It has the information you want to know about so you can make the all-important decision to upgrade to this motor or not.

The 6.7 Powerstroke Origin


It is said that this new upgraded engine is based on the old 6.0L and the 6.4L engines Ford had built before 2011. The 6.7 was introduced in 2011 and it is used to power the tough Ford Super Duty Trucks.

Ford had a lot of problems with the old 6.0 and 6.4-liter engines which is why they stopped contracting the construction of their diesel motors out to other companies. They decided to take the bull by the horns and build their own diesel engines in-house. Thus the 6.7L was born.

However, this decision did not stop Ford from having some of the usual problems that had plagued the 6.0 and 6.4-liter engines. There were and are still some bugs to work out.

One of those bugs has been the fuel pump issue. The 6.4L motor had a lot of trouble with the failure of this vital part and even with the upgraded CP4.2 version, problems still exist. When the pump fails, it sends a lot of debris through the fuel system causing up to about $8000 in damage.

Owners still have to buy a CP4.2 fail-safe/bulletproof kit to avoid this problem. The purchase needs to come before you have a problem with the fuel pump.

What Kind Of Fuel Mileage Does a 6.7 Powerstroke Get?

As we reported earlier, the average mpg you will get will depend on your driving and towing situation. If you are heavy-footed when you drive, then do not expect to get the maximum 30 mpg even when empty and you are the only passenger.

The worst-case scenario is about 9 mpg. That is when you are going over some high mountains with a maximum cargo and tow rating on the back of your rig. As you know, the more power you need, the more fuel your 6.7L will consume. Plan your trips well to avoid those areas that require a lot of power to make over those steep inclines.

Also, watch the weight of your cargo, supplies, equipment and the weight of the trailer. While the Super Duty cab can tow and carry a lot of weight doesn’t mean you should push the limits and use a lot of fuel.

Average Fuel Mileage 6.7 Powerstroke


The average mpg that 6.7 owners have been reporting is 18 on the highway and only a little drop in the city. City driving per these same owners has been about 15 mpg. Some reports have recorded an average of 17 mpg on the highway so use these figures as a guide only and not as a guarantee.

Your average mileage will depend on the same factors used to determine the general mpg you will get when driving this vehicle. If you can watch your speed, you should do better than average and the same would apply if you cut the weight of your trailer and supplies, etc. down a bit.

While the 6.7L has a factory range, the amount of mpg you get is all determined by you. Make sure to keep the engine well maintained to maximize your mpg rating. Taking care of the engine ensures that it will help you take care of your budget for fuel.

2020 F350 Diesel Mpg

All results reported here will be per the owners who have stated their results. Whether they are fudging their results a little bit or not we do not know. If they did they had their reasons for doing so.

Take the results with a grain of salt and not as a result you will get. One owner reported that for one 1100 mile leg of his journey, he got 20.2 mpg, and the next leg after 500 miles, he was getting 22 mpg. The difference in results was due to pulling a small utility trailer for about 400 miles.

Another owner reported that when he was driving at 60 mph, he was getting about 11.5 mpg but he was towing almost 15,000 pounds. When empty, he was getting in the neighborhood of 21 to 22 mpg on the highway at a speed in the low 60s.

One final example has the owner breaking in his new 6.7L engine and driving at 70 mph approx., he was getting around 18.5 to 19 mpg. When he towed a nice trailer at approx. 60 mph, his results were 10 mpg.

As you can see the results will vary depending on the use situation.

How Much Fuel Does a 6.7 Powerstroke Use At Idle?

How-Much-Fuel-Does-a-6-7-Powerstroke-Use-t -dle

There are two different figures quoted that provide the answer to this question. One person stated that a rough estimate would be around 1 gallon or a little more per hour. But that amount will depend on several factors including if you are using any accessories like AC during that time.

Also, the alternator and PTO may contribute to that high total if they are working harder than they should be. Other owners have said that the fuel used when idling should be lower than 1 gallon and place it at about 1/2 a gallon per hour.

These are rough estimates of course as not many people do this test to find out this result. Another owner stated that he idled his 6.7L for 14 hours approx., and he said he only burned a little under 2 gallons over that large period of time.

That measurement was not done with instruments monitoring the fuel use. In other words, after reading these results, your fuel consumption at idle will vary. It is hard to measure as results also depend on idle speed, environmental conditions,and so on.

Check your manuals to see if the factory reports this rate or not. Or call your dealer to see what they say.

2020 Ford F250 6.7 Diesel Mpg Towing


The rate for towing mpg is not going to be encouraging. While it would be nice if this was a perfect world and you got 20 to 30 mpg even when towing heavy loads. But it is not and the results you are going to get will be disappointing, to say the least.

The average towing mpg runs around 9 to 10 mpg and again those averages will depend on your driving habits, the trailer weight, and payload weight. It has been reported that pulling small and light utility trailers do not affect the gas mileage that much. One owner claimed he got around 20 mpg in this situation.

The best advice that can be given is to keep track of how many gallons you put into your tank and the miles your drive between each fill-up and then do your own calculations. Then you will have an accurate record of your driving conditions.

The 6.7L Specs


The following table will give you a quick read on the specs that come with this motor. That way you can see all the facts and make a very informed purchase decision.

Category Specs
Oil capacity 13 quarts including filter capacity
Oil type 5W-40 operational temps & 15W40 for heavy workloads
Torque 660 @ 1600RPM to 1050 @ 1800 RPM
Horse Power between 270 and 475 depending on chassis & model year
Transmission 6R140
Compression Ration 16.2:1
Engine block compacted graphite iron
Cylinder heads aluminum, 4 valves per cylinder and 1 glow plug each
Fuel pump CP4.2 fuel pump
Turbocharger single with two compressor wheels on the compression side of operations
Emission system EGR before the cooler
Miles per gallon between 9 and 30 depending on driving habits, etc.
Lifespan approx. 500,000 miles (with proper and consistent maintenance)

Some Final Words

The amount of mpg you will get when using the vehicle with this engine under the hood is up to you. You remain in control of how far you go on a single tank of gas. If you watch your towing weight and your cargo and passenger weight, then you should get fairly good results.

Also, make sure to not be a heavy-footed driver as that will cut your distance down quite a ways.

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