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6.0L Power Stroke Engine and Drivetrain Discussion of the 6.0L Power Stroke diesel engine and drivetrain in the 2003-Up Super Duties and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.0L Power Stroke engine.

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Old 02-22-2008, 11:05 AM   #1 (permalink)
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6.0 fuel economy

I have a stock '05 F-250 crew 6.0 dsl. This truck has lots of little factory toys. One toy is called the mini message center - a digital read-out on the dash. According to the dash readings, I'm getting about 13.0 - 13.2 mpg. Everyone I talk to cites anywhere from 16.0 to as high as 23.0 mpg on the 6.0. So what's the deal?? Any suggestions?? Someone told me that the dash readings are never right and that I should calculate the mileage myself. I'd like to hear from some of you concerning the accuracy of the dash readings. Even if you don't have the message center option in your truck, what's your 6.0 mpg? This truck has about 110,000 miles on it - therefore it's plenty broken in.
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Old 02-22-2008, 11:13 AM   #2 (permalink)
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i have an 07 with around 18k miles. i avg around 16.4 per the lie-o-meter.
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Old 02-22-2008, 11:23 AM   #3 (permalink)
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I also have a 2005 F-250 CC and get 15 mpg average hand calculated. Lie-o-meter is usually off about 1 mpg. I don't see how 23 mpg is possible.
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Old 02-22-2008, 12:31 PM   #4 (permalink)
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You can get 23 mpg if you do the following:
Go on a long trip at highway speeds of 60 or less and stay right behind the semi-trucks. Anyone who is saying they get 23 around town is either lying or they don't know how to divide.
I have gotten as high as 19.7 on the highway doing 65 behind semi's.
Around town I get 14.5-15 during the summer and 13.5-14.3 during the winter. My truck is bone stock.
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Old 02-22-2008, 12:43 PM   #5 (permalink)
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My driving is mixed, highway/ around town with a bias towards town. I ave. 15-16. I am happy with this considering what I am driving. I had an 03 Ram 3500 Cummins and averaged 14-15 with an Edge on tow mode and an easy right foot.
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Old 02-22-2008, 01:25 PM   #6 (permalink)
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I get 13 or so around town and 16-18 on the freeway at less than 70MPH speeds. The addition of a tuner and a brick under the skinny pedal should increase your mileage by as much as 3 MPG.. I got 7.4 pulling my 15K 5'er to the dunes last week..
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Old 02-22-2008, 05:19 PM   #7 (permalink)
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I have an 07 F-350 Long Bed FX4 CC, its got 9800 miles and it gets 14.5-15 mpg and I drive as gentle as one can.

As a matter of fact I get that same mileage in my 5.4 gasser.
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Old 02-22-2008, 06:15 PM   #8 (permalink)
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I just make a 404 ( Tuesday)mile run on my 6.0 and got 17.12 MPG just before trip I did the following and drove at 72 MPH / 2250 RPM
Changed AIR Filter
Changed the oil to a 5W-30 Synthetic
Nitrogen in tires

On and earlier trip on Sunday before above changes and driving 65 MPH I got 14.13 MPG

Also to add on Satruday I pulled the below TT and got 8.37 will towing 343 miles.
On Wednesday towing TT with above changes I got 9.89 MPG

These trip are going from Booneville, MS to Auburn, AL 90%+ freeway driving.
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Old 02-22-2008, 08:59 PM   #9 (permalink)
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Ihave a 07 -350 6.0psd, 14.5 - 15mpg to and from work ( 30 mi rt ) 17 - 18mpg
freeway. Dash meter in my truck seems to be about a half a mile off.
Best mileage under 70mph or 2000rpm.
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Old 02-22-2008, 09:27 PM   #10 (permalink)
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My around town mileage is about 16 summer, 15 winter, less if you stand on the throttle often. On the highway I have done two trips 3000 mile return trips two Saskatoon from Vancouver in Summertime. On both trips I started off determined to hold the speed at 60 MPH for good fuel economy. I held this speed thru most of BC but ended up zipping across the Prairies at 75 MPH(too many long, straight, boring roads) Average fuel mileage was 18.2 calculated and 18.7 by the trip computer.
On 700 miles which I did at 60 MPH the computer showed 20.5 MPG, then dropped little by little as I continued on at 70 -75 MPH.

I have noticed that the 6.0 gets slightly better mileage than my 2000 7.3 when holding higher speeds, but the 7.3 did slightly better than the 6.0 at 60 MPH. This is probably because the 7.3 had max torque at 1600 rpm (about 55 mph with 3.73 gears?) whereas the 6.0 has max torque at 2000 RPM ( about 70 MPH with 3.73 gears) The 7.3 was a manual , the 6.0 is a torqshift. I don't think the torqshift loses much fuel economy on the manual at highway speeds but it sure does on stop start driving , especially if speeds are too low for the torque convertor to lock up.
My 2000 7.3 manual got such good mileage on 40 to 50 MPH local driving that I don't want to post it here, no one will believe it.


Engines generally produce the greatest fuel efficiency right around their max torque RPM.
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Old 02-22-2008, 09:35 PM   #11 (permalink)
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I have a 2006 F250 2wd Crew Cab 6.0 Automatic that averages about 19 highway (avg of about 10 trips of 370 miles each) driving the speed limits which range from 55 to 70 on these trips. Pulling a 3 horse GN trailer which weighs approx 9,200 lbs, I average about 12.5 mpg driving 60 to 65 mph. Truck has 35,000 miles on it. No dash meter on this truck, so all figures are hand calculated. I've had several cars and SUV's with the dash meter and have never had one that was correct yet. I always hand calculate mpg and do it over several tanks, not just one, in order to average out the variables from each fillup and driving conditions.
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Old 02-23-2008, 12:12 PM   #12 (permalink)
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Old 02-23-2008, 01:05 PM   #13 (permalink)
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My lie o meter says 13.9 mpg. I seen it as high as 16.7 but not long. 550km on the trip meter is when I usually fill up. I've filled up at 675 km a couple times but this was right after 3 injectors were repalced.
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Old 02-23-2008, 03:54 PM   #14 (permalink)
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550 kms per tank is pretty light. Driving for good fuel economy, I routinely go 950kms in winter, 1100kms in summer/highway driving. I do fill the tank right to the top each time (roughly 16 litres/4 gallons after the fill handle auto shuts) and take it down till the low fuel light comes on, perhaps that is most of the difference.
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Old 02-23-2008, 08:08 PM   #15 (permalink)
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I am lucky to see 13 MPG in town with my 05,16-17 HWY IF I keep it below 70 MPH,like another poster said, try to keep your RPM's Below 2K (around 70 MPH with 3.73 gearing)
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