42 MPG combined is a respectable figure for the 2017 Ford Fusion Energi Plug-in Hybrid 2.0L 4-cyl., but the number itself doesn’t tell the whole story. It’s about strategic efficiency. The Energi targets a specific buyer: the commuter with a relatively short daily drive, someone who appreciates the Fusion’s composed ride and stylish design, and who wants to minimize trips to the gas station, even if it means paying a premium upfront.

City and highway performance

The EPA breaks down the Fusion Energi’s fuel economy into 43 MPG in the city and 41 MPG on the highway. These figures highlight the strength of the plug-in hybrid system. Stop-and-go city driving allows for greater reliance on the electric motor, maximizing fuel savings. While the highway number is slightly lower, the Energi’s regenerative braking system still contributes to efficiency even at higher speeds. The automatic transmission (variable gear ratios) smoothly blends electric and gasoline power, which is key to achieving those numbers. Keep in mind, though, that aggressive acceleration will quickly diminish your mileage, just like with any hybrid or gasoline vehicle. The EPA doesn’t give separate MPG figures for when the vehicle is running purely on electricity, however your efficiency will be vastly superior when plugging in often.

Annual fuel cost

The EPA estimates that the 2017 Ford Fusion Energi will cost $1,050 per year to fuel. This calculation is based on driving 15,000 miles annually, using a blended mix of city and highway driving, and assumes national average fuel prices. The important word here is “average.” If your daily commute is significantly shorter than the assumptions used in the EPA calculation, and you diligently charge the Energi, you will likely spend far less on fuel. On the other hand, drivers who frequently take long trips, or neglect to plug in regularly, will likely see their annual fuel cost exceed this estimate. The relative price of electricity compared to gasoline will also play a real role in this figure. Be sure to compare your usage habits to the EPA standard before buying.

Real-world expectations

While EPA estimates provide a useful benchmark, it’s important to consider real-world scenarios. The Fusion Energi’s electric-only range is relatively limited. Once the battery is depleted, it operates as a regular hybrid, and fuel economy will more closely resemble a standard hybrid (around 40 MPG combined). Drivers who consistently maximize the electric range by charging frequently can significantly exceed the EPA’s combined MPG figure. However, those who rarely plug in should expect to see numbers closer to a conventional hybrid or even slightly lower, due to the added weight of the battery pack. Factors such as driving style, terrain, and weather conditions will also influence real-world fuel economy.

How it compares

The 2017 Ford Fusion Energi competed directly with other plug-in hybrids like the Toyota Prius Prime and the Chevrolet Volt. The Prius Prime, known for its exceptional efficiency, achieves an EPA-estimated 54 MPG combined. However, the Prius Prime prioritizes efficiency above all else, with a less engaging driving experience and a more polarizing design. The Chevrolet Volt, prior to its discontinuation, offered a larger electric-only range than the Fusion Energi, appealing to drivers who wanted to minimize gasoline usage. Compared to a conventional hybrid like the standard Ford Fusion Hybrid, which achieves around 42 MPG combined, the Energi offers the potential for even greater fuel savings, provided the owner actively uses its plug-in capabilities. For comparison, you can also see all FUSION MPG across all years, or all Ford fuel economy data here on FuelEconomyHub.

Tips to maximize efficiency

The best way to improve mileage is to maintain tire pressure. Properly inflated tires reduce rolling resistance, which translates directly into better fuel economy. Check your tire pressure regularly and inflate them to the manufacturer’s recommended specifications, which can be found on a sticker inside the driver’s side door frame.

Gentle acceleration and smooth braking are critical for maximizing efficiency in any hybrid, but particularly in a plug-in hybrid. Avoid sudden bursts of speed and anticipate stops to allow for regenerative braking to capture energy and recharge the battery. Jackrabbit starts and hard braking waste energy and reduce fuel economy.

Plan your trips strategically. If you have a short errand to run, prioritize using the electric-only mode. Save the gasoline engine for longer trips or when you know you won’t have access to a charging station. This strategy allows you to take advantage of the Energi’s electric capabilities while minimizing fuel consumption.

Take advantage of off-peak charging rates. Many utility companies offer lower electricity rates during off-peak hours, typically at night. By charging your Fusion Energi during these times, you can further reduce your overall operating costs. Also, by pre-heating or pre-cooling the cabin while the vehicle is plugged in, you can preserve your available driving range on the road.