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Guest Message by DevFuse

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Register your Fusion Hybrid at the official Ford authorized registry here.

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MPG dropped quickly and markedly

mileage mpg 2010

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1 reply to this topic

#1 OFFLINE   wcrr


    New Member

  • Fusion Hybrid Member
  • 1 posts
  • Region:U.S. Great Lakes
  • Location:Wauwatosa WI
  • Current Vehicle:Ford Fusion Hybrid
  • My Hybrid's Year:2010

Posted 07 February 2018 - 01:55 PM

I have a 2010 Fusion Hybrid purchased new, and had been getting reasonably good MPG since we purchased it (we love the car).  It now has about 68,000 miles. I live in a northern climate (southern Wisconsin), but have been averaging about 40 mpg overall, a little higher in summer and a bit lower (upper 30's MPG) in winter.  To the best of my knowledge, my driving habits have remained the same, and we almost always get gas from the same gas station.  The car is regularly taken into the Ford dealer where I purchased it for oil changes (and routine checkups) and the recommended checkups at 10K mile intervals.


A couple months ago, my average MPG dropped suddenly and markedly to about 25-26 MPG, and it has stayed in that range.  It is indeed winter here, but I have never had this low an MPG on this car even in the winter.


Before I take it into the repair shop, can folks give me some idea what might be happening?   


Thank you.

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#2 OFFLINE   Bike13Bill


    New Member

  • Fusion Hybrid Member
  • 1 posts
  • Region:Decline
  • Location:Magnolia, DE
  • Current Vehicle:2010 Fusion Hybrid
  • My Hybrid's Year:2010

Posted 18 February 2018 - 07:02 PM

My story is very similar to yours. The differences are that my problem started in the second week of February and I live in Delaware. A local dealer had the car for most of a week and within two days after I got it back the problem reoccurred.

I know that the problem is temperature related. My car is always outside. If the air temperature is 50+ the problem may not occur. Below that it will not switch to EV mode except when it is stopped. I know there is a small battery that is necessary for the proper operation of the computer that controls the EV/battery charge function.

I'll let you know what I learn.

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