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Is this normal?

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Old Jan 15, 2014 | 09:46 AM
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Default Is this normal?

I bought my '13 Ecoboost on July 13th, 2013 and within a few weeks I saw 16.7 MPG. I don't do any highway driving or very little as it's my weekend truck since I have a company vehicle for work.

It's about 6 months later and I've got a little over 4600 miles on the clock and my mileage has dropped to 15.2 MPG which is where it was at when I bought the truck. I haven't changed how I drive; I'm not heavy on the gas and I drive fairly conservative (I try to stay out of boost as often as possible) as fuel is expensive.

I'll be making an appointment at the dealer for the first oil change in the next two weeks and I'm wondering if I should have them look at the MPG recall even though my truck is not on the list.
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Old Jan 15, 2014 | 09:48 AM
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not sure that mpg on the ecoboost engine has ever been discussed, should be interesting to hear others experiences with this issue
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Old Jan 15, 2014 | 09:50 AM
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Winter grade gas?
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Old Jan 15, 2014 | 09:53 AM
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Originally Posted by Sgb020
Winter grade gas?
You know what. I didn't even think of that. It did start to decline right around the change of the season. I've managed to get it to hit 16 MPG but within a day it's always back down to 15.2. I'm wondering if I switch to the mid grade fuel if it would improve any. I'll have to experiment now.
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Old Jan 15, 2014 | 10:05 AM
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If i got 16 in town id be thrilled. Sitting at 14.2 right now for this last tank, 50/50 hwy and city.
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Old Jan 15, 2014 | 10:06 AM
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Originally Posted by Cowpig
not sure that mpg on the ecoboost engine has ever been discussed, should be interesting to hear others experiences with this issue


Now thats funny right there....
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Old Jan 15, 2014 | 10:11 AM
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My 5.0 lost 1.5 mpg when the winter fuel came out. Hopefully that is all that it is.
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Old Jan 15, 2014 | 10:12 AM
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There are ton of threads about this, but to summarize:
-Winter grade gas will drop your mpg's
-Colder temps drop your mpg's quite a bit, since it takes so long for your drivetrain to get up to operating temps and for the tranny to begin operating efficiently. Tires are stiffer for a bit too when cold (and check your tire pressure).
-If you let your truck warm up longer in cooler temps, that will hurt your mpg's too.
-Shorter trips, less than 15 minutes, hurt your mpg's, especially in colder temps.

Those apply to all engines/trucks, but the EB seems to be affected more than the others. That's probably due to the turbos spooling up sooner to overcome the sluggish drivetrain and tires until warmed up. Once warm, and on longer trips, my mpg's are equal to summertime (5.0 engine). Until warm, and on short trips in this winter weather, my mpg's suck. I would bet that goes for the EB too. Also, don't baby it too much. You'll get better mpg's by getting up to speed moderately rather than sluggishly, and by using less brake and coasting up to stops sooner. It's a truck. Drive it and enjoy it.

Last edited by Ford850; Jan 15, 2014 at 10:14 AM.
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Old Jan 15, 2014 | 10:13 AM
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winter gas and more idle time to warm up
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Old Jan 15, 2014 | 10:14 AM
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Winter gas is not your friend.
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