Another article on the C-max. Author repeats some of what we already know (CR and Greencar report), but also says in his one test, he was dissapointed in the mileage also.
Full article here: http://www.marketwatch.com/story/for...age-2012-12-08
Hyundai, Honda and now Ford have been accused of cooking the mileage books, and in the first blush of evidence—I just ran a tank of gas through the C-Max and got 33.9 average mpg—I also judge the C-Max’s rating to be grossly inflated.
The point is, I drove the C-Max Hybrid pretty hard and that lowered my mileage. Still, with the cruise control set on 76 mph on a dead-flat four-lane highway in mild conditions, the C-Max’s instantaneous mileage readout was fixed at 35.8 mpg, well short of nominal.
It must be noted: The C-Max’s across-the-board 47 mpg is a monster number, almost patently suspicious. We are looking at a 3,607-pound vehicle with 188 hybrid horsepower (2.0-liter, 141-hp Atkinson-cycle four-cylinder; continuously variable transmission; AC synchronous electric motor; 1.4 kWh lithium-ion battery pack with 35 kW max output). This is a five-seat, five-door hatch boasting zero-to-60 mph acceleration of around 8.2 seconds, considerably quicker than the rival Toyota Prius V, which is rated at only 44/40 mpg. The C-Max outweighs the Honda CR-Z hybrid sport coupe by a half-ton and yet, by EPA estimates, gets more than 25% better fuel economy.
And while the C-Max is aero-sleek to the eye, it actually puts a significant dent in the air (63.9 inches high and 82 inches wide at the side mirrors). Frankly, I’m impressed I got 33.9 mpg.
Where does all this leave the C-Max? I think it’s likely that Ford’s hybrid powertrain programming is, let’s say, overly familiar with the EPA’s testing regime. For example: Key to the Ford hybrid’s system big numbers is its all-electric speed range of up to 62 mph. If you are really gentle with the accelerator, you can reach highway speeds without ever switching on the gas engine. That’s a huge win during the testing cycle, though hard to replicate in the real world. I wouldn’t even call it an attempt to game the system. It’s the result of human nature, to the extent that automotive engineers are human.