I've had my C-Max for ~4 months and every fillup am consistently seeing 0.5-1 gallon underestimated by the computer. I get gas from several different sources so its not likely the pumps are all off. After reading this forum its clear Ford is not doing a good job in their fuel estimate. This seems like more fuel for the mpg lawsuit. This drops my mileage from low 40's to high 30's which is starting to sour me on this vehicle. I get very high scores on acceleration, braking so I dont think I can eek much more mileage out of the car.
