Mpg display on dash at 11.8 - 12 mpg is this normal?

1mpg · Jul 23, 2013

I'm new to the 3rd gen 07 expedition eb and for about a month now I've taking this truck on maybe 30-40 minute highway drives and I've noticed that the mpg doesn't change from 12mpg. I would expect to see the 12 mpg on the city but on the highway under 65-70mph shouldn't I get an increase in mpg's? I bought the truck at 81k miles so I'm not sure what the previous maintenance record looks like other than I got an oil change when I bought her. Should I be looking into replacing the spark plugs? The truck runs fine other than I think it's a little slow when I punch it and I barely do that anyways so I'm not sure if this is normal but my old 2000 expedition EB seemed faster when floored.

Also I'm aware that the mpg reading on dash aren't always accurate.

tonydiv · Jul 23, 2013

Are you running the stock size tires?

I would just do the occasional manual calculation on mpgs to see how accurate the computer is.

Also, remember that the truck is as aerodynamic as a brick.

bricekin · Jul 23, 2013

1mpg said:
I'm new to the 3rd gen 07 expedition eb and for about a month now I've taking this truck on maybe 30-40 minute highway drives and I've noticed that the mpg doesn't change from 12mpg. I would expect to see the 12 mpg on the city but on the highway under 65-70mph shouldn't I get an increase in mpg's? I bought the truck at 81k miles so I'm not sure what the previous maintenance record looks like other than I got an oil change when I bought her. Should I be looking into replacing the spark plugs? The truck runs fine other than I think it's a little slow when I punch it and I barely do that anyways so I'm not sure if this is normal but my old 2000 expedition EB seemed faster when floored.

Also I'm aware that the mpg reading on dash aren't always accurate.

This might be a stupid question... but have you hit the reset button while the avg mpg is shown on the cluster? If you bought the truck and it is averaging MPG over the last 5000 miles... its not going to change much or very quickly.

1997SCEBFEX · Jul 23, 2013

bricekin said:
This might be a stupid question... but have you hit the reset button while the avg mpg is shown on the cluster? If you bought the truck and it is averaging MPG over the last 5000 miles... its not going to change much or very quickly.

Good point for sure.

Deduce you're also using OD?

PanHandler.

tojohnso · Jul 23, 2013

Definitely check to ensure you reset the MPGs. I do it every fill-up and run my own calculations. Surprised me to see the last 330.1 miles I ran from NJ to VA the computer and calculations were spot on at 18.8 MPG on my '11 EL.

Around town, I have short commutes so my average MPG tends to range from 11 - 13 MPG.

1mpg · Jul 23, 2013

Truck is bone stock on stock 17's and no I don't floor it really nor use the overdrive. I let it get to speed without holding back traffic and often ***** at the wife for how hard she sometimes takes off. I have reseted the trip setting but have not actually calculated how many mpg's I'm getting when I fill up again. Also do you guys mean that I can press the reset button when looking at avg mpg's on the dash?

I have not put more than maybe 1300 miles on her yet and mostly is city miles but its like country roads where the wife works so no stop n go traffic at all. Im going to calculate at next fill up although its been really muggy in CT and we've been using the ac a lot.

toms89 · Jul 23, 2013

If you want better fuel economy why would you turn overdrive off ?

Dib52 · Jul 23, 2013

Sounds about right to me. Running surface streets, I rarely see anything better and I'm heavy on the throttle. Truth be told, I like to hear the exhaust and intake sing from light to light. Now, if I baby it in the city, I might see 13.something, but it seems I'm always in a hurry.
Out on the open road is where I get the best milage. I'm usually in the 18.something range during road trips, and that's with the lift/tires/and shorter 3.73's.

1mpg · Jul 23, 2013

toms89 said:
If you want better fuel economy why are you turning overdrive off ?

Please excuse my ignorance since I've owned manual cars since I was 16 so the o/d feature on this truck is something I've only use to pass someone quickly on the highway or when I'm going up hill and the truck seems like it needs to down shift a gear to climb and maintain speed. All other times I'm on flat land and I do not need to push in the o/d button so am I not using this feature in an economical way?

1mpg · Jul 23, 2013

Dib52 said:
Sounds about right to me. Running surface streets, I rarely see anything better and I'm heavy on the throttle. Truth be told, I like to hear the exhaust and intake sing from light to light. Now, if I baby it in the city, I might see 13.something, but it seems I'm always in a hurry.
Out on the open road is where I get the best milage. I'm usually in the 18.something range during road trips, and that's with the lift/tires/and shorter 3.73's.

Did you see a difference when you put in the k&n?

Mpg display on dash at 11.8 - 12 mpg is this normal?

1mpg

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tonydiv

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bricekin

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1997SCEBFEX

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tojohnso

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1mpg

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toms89

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Dib52

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1mpg

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