What is the best mpg you have recorded with your manual trans Fusion? In Michigan our speed limit is 70 on the hwy, so figure I am usually driving 75 on long trips and honestly I don't think I have broken 30mpg at those speeds. Tooling along at 55 in 5th gear is another story. The best average I have seen is right around 27mpg over a tank of fuel, combined city and hwy driving. But to work and back I am usually looking at 25mpg or so.