EPA announced the official ratings for the 2013 Ford Fusion Energi plug-in hybrid, and it’s estimated to deliver up to 108 MPGe. That makes it it America’s most fuel-efficient sedan, beating the Toyota Prius plug-in hybrid by 5 MPGe. That also means that Fusion Energi drivers can potentially save up to $6,850 in fuel costs compared with an average new car over the course of five years.

The EPA also certified Fusion Energi to deliver up to 92 MPGe highway and a combined 100 MPGe. To achieve this excellent fuel economy, Ford Fusion Energi relies on a number of advanced technologies – besides the plug-in hybrid powertrain – to be as frugal as possible. It gets SmartGaugewith EcoGuide to help the driver optimize his or her driving style, hybrid transmission, EV cruise, regenerative brakes, and…

The Energi, like all electrified Ford models, also comes with SYNC with MyFord Touch featuring additional options for monitoring information like battery state of charge. EV+ combines the built-in GPS of Ford SYNC with proprietary software algorithms developed by Ford engineers to learn frequent destinations, thus giving more drive time in electric-only mode.

Below is a list of the technologies Ford uses in their hybrid and electric models:

• MyFord^® Mobile: Enables access via smartphone or Web-based interface to perform key tasks, such as monitoring a vehicle’s state of charge and current range or locating charge stations and planning routes to find them
• Eco cruise: Saves vehicle energy by relaxing acceleration compared to standard cruise control
• EV mode button: Conveniently mounted on the console to the right of the shifter – allows a driver to switch vehicle operation between three modes: all-electric, normal hybrid operation and conserve battery power for later use
• Regenerative braking is capable of capturing and reusing more than 90 percent of the braking energy normally lost during the braking process
• Hybrid transmission, designed by Ford engineers in-house, is capable of operating at high speeds and in a smooth, fuel-efficient manner at the same time
• Advanced lithium-ion batteries used in Ford’s electrified vehicle lineup – covered by an eight-year/100,000-mile component limited warranty – are smaller and lighter than nickel-metal-hybrid batteries used in previous-generation hybrids
• Charge port with LED light ring, conveniently located on the driver’s side and near the front of the car, it features a light ring that illuminates to indicate charge status