Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum - View Single Post - ZX3 ,, sudden drop in gas mileage ??
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Old 01-02-2013, 02:24 PM   #12
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Join Date: Jun 2011
Fan#: 86621
Location: Vista, CA
What I Drive: 2012 focus sedan se

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I have the same sudden drop in mileage. Went from 30.5 average in mixed town highway driving to 29. Worse, the highway mileage went from 45 to 38. (I'm a fairly slow driver)
Could it be transmission reprogram which I had done last fall?
2012 focus with 15,500 miles total.
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