Get the $395 Fuel Economy Package, and you enable an impressive 30 mpg city, 40 highway with the base engine, adding aerodynamic improvements, low-rolling-resistance tires, and cruise control. Perplexingly, at least in previous model years , this package has only been offered on the SE trim, so you have to be a pretty dedicated Fiesta fan to seek it out. We don't yet see this package listed for 2014 but will update it as Ford releases more info.
For the rest of the model lineup, EPA ratings are 28 mpg city, 37 highway with the five-speed manual gearbox, or 29/38 with the six-speed Powershift dual-clutch transmission.
We don't have anything official yet on what will be one of the most interesting stories for 2014, from a green-car standpoint. Ford is offering a new 1.0-liter EcoBoost model of the 2014 Fiesta. While this new model will be positioned above the base-engine models (and below the high-output ST, obviously), we're anticipating that it will be offered as an part of an option package on the SE and/or Titanium. With EPA Combined numbers expected to arrive in the mid-30s, with a likely EPA highway rating of 42 to 43, this model should offer a compelling mix of livelier acceleration with better fuel economy, compared to the the base model.
High-performance Fiesta ST models are actually very fuel-efficient, too. They get 26 mpg city, 35 highway.