Contour Enthusiasts Group Archives Forums Modifications 3.0L Duratec 3L Fuel Economy

With my stock injectors, maf and PCM I was able to get about 17 in the city and 28-30 on the highway depending on load, wind, and speed.
I could get 28mpg at 80mph with some luggage in the back.

So I didn't loose anything on the highway but I lost about 1 mpg in the city. I never got good city mileage because it was always too much fun stepping on the throttle.