You want 28 to 30 mpg? You got to live with the lack of high end
My 1993 Escort gets that mileage or more, and has plenty of scoot at the high end (and the low end).
http://www.fueleconomy.gov/feg/noframes/9918.shtml
Fuel Type Regular
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MPG (city) 25
*
MPG (highway) 33
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MPG (combined) 28