I do primarily highway, keep a spreadsheet of mileage, gas costs and mpg. Picked the C-Max up Oct 27th. My primary drive is highway on ECO cruise at 60 - 65 MPH For November by stats where 1,232.6 driven, 35.044 Gals, @ 35.173 For December 1,187.2 driven, 34.153 Gals @ 34.761