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55 replies to this topic

#1 dtpfinalccrew

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Posted 06 April 2011 - 11:17 AM

I have had my 2011 f150 ecoboost for about a month now. I cannot seem to get the fuel mileage above 16 mpg for city driving, I was wondering if this is normal and if not what should i do. It seems to be getting worse mileage than my 2008 with a 5.4. Havent been on the highway long enough to see if it hits the rated 22 mpg that is advertised. it just broke the 1000 mile mark.

thank-you







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#2 coreground

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Posted 06 April 2011 - 01:43 PM

I have had my 2011 f150 ecoboost for about a month now. I cannot seem to get the fuel mileage above 16 mpg for city driving, I was wondering if this is normal and if not what should i do. It seems to be getting worse mileage than my 2008 with a 5.4. Havent been on the highway long enough to see if it hits the rated 22 mpg that is advertised. it just broke the 1000 mile mark.

thank-you


I've been getting 16 avg on mostly highway driving for about 450 miles. When I'm going around 40mph on relatively flat road the instant mpg gauge is pegged near the top. This is Screw 4x4 w/ 3.73 gears and 6.5 ft bed. FWIW they advertised 21mpg for 4x4.

#3 Lance Nunley

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Posted 07 April 2011 - 11:02 AM

I've been getting 16 avg on mostly highway driving for about 450 miles. When I'm going around 40mph on relatively flat road the instant mpg gauge is pegged near the top. This is Screw 4x4 w/ 3.73 gears and 6.5 ft bed. FWIW they advertised 21mpg for 4x4.


What octane gas are you using? Mine seems to do better with 89 and 93.

#4 mikesxpress

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Posted 08 April 2011 - 02:20 AM

What octane gas are you using? Mine seems to do better with 89 and 93.


What is "better"????????????
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#5 coreground

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Posted 08 April 2011 - 07:05 AM

What octane gas are you using? Mine seems to do better with 89 and 93.


The recommended 87. Purchased at the cheapest place around... Costco.

On the way to work today I used the cruise control and 60mph and based upon the 5min bar graph I was getting about 22 highway on a 12mi trip. I must say that I'm usually a 75-80mph driver and that I haven't used cruise control until today as it was suggested that I not until 500mi.

I have a 100mi round trip drive to take this after noon. I'll reset the counters use cruise at 65 and see what i get.

Edited by coreground, 08 April 2011 - 07:07 AM.


#6 tzolk

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Posted 08 April 2011 - 07:17 AM

Coming back from work yesterday, reset Trip B once I hit the HWY so all highway mileage with two interchanges and speeds of 68mph-65mph ended up with 20.7 mpg on the 22 mile jaunt. Computer calculated. 4x4 3.73 Screw 5.5. Just turned 1000mi.

#7 coreground

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Posted 11 April 2011 - 06:48 AM

The recommended 87. Purchased at the cheapest place around... Costco.

On the way to work today I used the cruise control and 60mph and based upon the 5min bar graph I was getting about 22 highway on a 12mi trip. I must say that I'm usually a 75-80mph driver and that I haven't used cruise control until today as it was suggested that I not until 500mi.

I have a 100mi round trip drive to take this after noon. I'll reset the counters use cruise at 65 and see what i get.



My round-trip was 18.5. The average was 17.5 at the halfway point.. And the average climbed to 18.5 on the way home.

#8 Rhodester

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Posted 21 April 2011 - 05:25 AM

Hello, new here. I am another guy here getting a lousy 17MPG on the Hwy, going 65 mph. Scab, 4x2, 3.55's, ecoboost. (first tank full) Bought the truck with hopes of 20-22 as my F-150 is an upgrade from a ranger that consistently saw 27-30 MPG for each tank (city and hwy driving combined) Doesn't seem that anyone is even coming close to the 21/22 hwy MPG (4x4/4x2) that the sticker says. I average 25K a year and will really be feeling it at the pump. So new truck sits and I am back to driving the ranger. I also have a F-350 that I use to pull trailers, though the F-150 could have replace both. Glad I didn't trade either of the other two in.

#9 La1cajun

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Posted 21 April 2011 - 07:04 AM

For the best gas mileage use your cruise as much as you can. Anytime you have your foot on the pedal your wasting gas. I notice on mine when i drive manually its hard to keep the instant fuel mileage way up there but when you use the cruise it stays up at least between half and all the way up most of the time. even when im in a 45 mph zone I use the cruise, it gets kinda second nature to me. IM averaging between 360-390 miles per tank on a mix driving of about 20% interstate and the rest in town in a hilly mountain state being Colorado. Hope this helps at least a little for ya.

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#10 La1cajun

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Posted 21 April 2011 - 07:07 AM

Hello, new here. I am another guy here getting a lousy 17MPG on the Hwy, going 65 mph. Scab, 4x2, 3.55's, ecoboost. (first tank full) Bought the truck with hopes of 20-22 as my F-150 is an upgrade from a ranger that consistently saw 27-30 MPG for each tank (city and hwy driving combined) Doesn't seem that anyone is even coming close to the 21/22 hwy MPG (4x4/4x2) that the sticker says. I average 25K a year and will really be feeling it at the pump. So new truck sits and I am back to driving the ranger. I also have a F-350 that I use to pull trailers, though the F-150 could have replace both. Glad I didn't trade either of the other two in.

As for the interstate you should definitly get more than 17 MPG. I get 21-23 easy in COlorado with using cruise. Im anxious to see how many miles I can squeeze out of the tank on a big trip with just interstate.

The Cajun

#11 coreground

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Posted 26 April 2011 - 01:27 PM

As for the interstate you should definitly get more than 17 MPG. I get 21-23 easy in COlorado with using cruise. Im anxious to see how many miles I can squeeze out of the tank on a big trip with just interstate.

The Cajun



This weekend got I 20.5 mpg highway basically on 121 between US75 and until i turned off just before 121 meets up with 114. This is about 30mi. Cruise was set at 60mph. DB SCREW 4x4 offroad 3.73 open/rear elocker... 2WD mode. 1200mi.

#12 taperk600

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Posted 26 April 2011 - 08:04 PM

Mine was 'round 20 highway for about the first 500 miles.... then started to drop. Same trip last week, was down to mid-17s where I was just shy of 21 when the truck was brand new in Feb. Go figure....

Interestingly though, I took a trip last Monday that gave me some strange MPG readings. When traveling on a 2 lane road, speed limit 55 but the average speed is usually 50 with traffic, I was getting 22.6 MPG over the 45 min stretch...best I've seen with the truck. However, once I got on the highway and was able to set the cruise at 70, it very quickly dropped down to 17.8 MPG.........and held that over the remaining hour. Seems odd to get less MPG on the highway than on the "country road".

Around town has been pretty consistantly 15/16 since new.

Truck has just under 4K. Super crew, 4x4, 3.73 max tow & off road package w/e-locker, 6.5 box with hard tonneau (Undercover) & std P-rated tires
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#13 coreground

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Posted 27 April 2011 - 06:47 AM

Mine was 'round 20 highway for about the first 500 miles.... then started to drop. Same trip last week, was down to mid-17s where I was just shy of 21 when the truck was brand new in Feb. Go figure....

Interestingly though, I took a trip last Monday that gave me some strange MPG readings. When traveling on a 2 lane road, speed limit 55 but the average speed is usually 50 with traffic, I was getting 22.6 MPG over the 45 min stretch...best I've seen with the truck. However, once I got on the highway and was able to set the cruise at 70, it very quickly dropped down to 17.8 MPG.........and held that over the remaining hour. Seems odd to get less MPG on the highway than on the "country road".

Around town has been pretty consistantly 15/16 since new.

Truck has just under 4K. Super crew, 4x4, 3.73 max tow & off road package w/e-locker, 6.5 box with hard tonneau (Undercover) & std P-rated tires


I have the same truck... with same tonneau (undercover se) and same tires.. And it does seem to perform the best at 45-50 mph constant speed. Start and stop will eat it up tho.

#14 lakeguy

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Posted 27 April 2011 - 07:00 AM

Anyone know why they recommend NOT using the cruise for the first 1000 miles? Is it because of the recommendation to vary speeds during the break-in period?

#15 Punkag

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Posted 27 April 2011 - 04:12 PM

Anyone know why they recommend NOT using the cruise for the first 1000 miles? Is it because of the recommendation to vary speeds during the break-in period?



Yes, that's why.

#16 mgcardoc

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Posted 03 May 2011 - 09:16 AM

Are you guys looking at the mileage reader on the truck or are figuring your mileage by filling up the tank, driving "X" amount of miles - then fill the tank again and divide the gallons into the miles driven? I guess the point is, I never trust the readouts and would be curious to see what of mileage these Ecoboost trucks are REALLY getting.

#17 rcmcmullen

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Posted 03 May 2011 - 11:09 AM

Are you guys looking at the mileage reader on the truck or are figuring your mileage by filling up the tank, driving "X" amount of miles - then fill the tank again and divide the gallons into the miles driven? I guess the point is, I never trust the readouts and would be curious to see what of mileage these Ecoboost trucks are REALLY getting.

I'm curious to know why you don't trust the fuel mileage calculations but trust the mileage calculations? Don't they both need to be accurate? It stands to reason that if the speedometer is inaccurate (and they often are), then the odometer would be inaccurate as well.
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#18 nmfiredawg

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Posted 03 May 2011 - 05:01 PM

I always hand calculated, My Dodge was 2.5 mpg higher on the computer. Filled up for the first time today and computer howed 17.2. Hand calculated 17.8 so mine is pretty close.

#19 taperk600

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Posted 04 May 2011 - 02:23 AM

Well, at first I hand-calculated the mileage. The computer calculations were extremely close, like .3-.5 off, so I stopped and just use the computer now. When I'm on a trip, I'll often reset the fuel mileage section of the computer at different parts of the trip if/when the road conditions vary (ie highway goes to country road goes to town driving ). That way I can kind of see what the changing conditions are doing to the mileage. I rest the trip 1 at every fill up and don't plan to reset trip 2 until the truck hits 1 yr so I
can see what it did over the course of a full yr of driving.

I know on my 2010 D-max, the computer was usually over by 1.5-2 mpg. The Ford seems to be much more accurate, but I guess it wouldn't hurt to check it again.
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#20 mgcardoc

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Posted 04 May 2011 - 01:06 PM

My Dodge was the "lie o meter". That's why I asked. I have heard the Ford mileage computers are much more acurate. So it's all good.




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