I am another '14 fiesta eco boost driver, did real good the first 2 summers, I didn't have much winter driving, until this past winter, really took a hit, lucky to get 36 mpg. I got new rims and tires last November, I went for the lightest set of 17's I could find, the open spoke of the wheel design is killing me low 40's are more common these days, a good cool evening with a hot engine and a fresh tank of fuel will push it into the 50's for a time, I want to make a clear plastic air block for the inside of the rims.
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