The mpg in my 2012 Ti 18" sport suspension car is trending up now that the weather is cooler and I do not run the AC. When I first bought the car, mpg was terrible around 24 mpg. Even on the highway, I have never seen better than 34 mpg @ 80 mph. Obviously, that would improve if I slowed down to 65-70 mph. My car currently has 5,500 miles on it, so the engine may still be in the wear in period.
Here is my fuelly page with detailed notes for type of driving and what fuel was used.
Beast's Fuelly Page
I do know that using 93 octane did help a little and made the engine feel more powerful. Currently, with NO AC, I am averaging 29-30 mpg with 50/50 city/hwy mix. I will say that the Focus is the least expensive car (cost per mile) I have ever owned.
2014 Mustang GT custom ordered to replace the GT500: Sterling Gray, NAV, Recaros, Brembos, Glass Roof, back up camera, 6 speed auto, loaded
2012 Focus Titanium - 18" wheels with handling package
2009 GT500 Shelby (700 rwhp) - sold