Sixty-seven MPG combined is not a typo. The 2020 Toyota Mirai achieves this remarkable figure, but it’s not measured in miles per gallon of gasoline. It’s the equivalent fuel economy achieved by this hydrogen fuel cell vehicle, a number that dramatically reshapes the concept of “fuel” and its associated costs for a very specific type of driver.

City and highway performance

The EPA rates the 2020 Mirai at 67 MPG in both city and highway driving. This consistency reflects the nature of electric motors, which operate efficiently across a wide range of speeds. Unlike a gasoline engine that spends much of its time at less-than-optimal efficiency, the Mirai’s electric powertrain delivers consistent efficiency whether navigating stop-and-go traffic or cruising on the open road. This also reflects how the car is driven by its owners. Most live and work in urban areas. The MIRAI MPG across all years has stayed consistent, reflecting the dependable powertrain.

Annual fuel cost

The estimated annual fuel cost for the 2020 Toyota Mirai is $784. This figure is calculated by the EPA based on 15,000 miles of driving per year and using the national average price of hydrogen fuel. While the Mirai’s “fuel” (hydrogen) is priced per kilogram rather than per gallon, the EPA’s methodology translates this into a familiar cost-per-year metric. This figure is meant to be illustrative; actual hydrogen prices vary significantly by region and station, and some Mirai owners may even receive complimentary fuel credits as part of their purchase or lease.

Real-world expectations

While the EPA’s 67 MPG equivalent is a useful benchmark, real-world “fuel economy” for the Mirai is less about miles per gallon and more about driving range per kilogram of hydrogen. The 2020 Mirai has an EPA-estimated range of 402 miles, but this figure can vary based on driving style, terrain, and ambient temperature. Cold weather, in particular, can affect the efficiency of fuel cell systems. Therefore, drivers who live where temperatures drop below freezing should expect a slight reduction in range. But the buyers, whose primary concern is zero emissions, do not object. They also understand their limited freedom in where they can purchase hydrogen, and view it as a tradeoff for pioneering clean technology and being eligible for carpool lane access.

How it compares

When compared to other alternative-fuel vehicles, the Mirai’s “fuel economy” stands out. The all-electric Tesla Model 3 Long Range, for example, is rated at 132 MPGe (miles per gallon equivalent). However, the Model 3 requires plugging in, while the Mirai can be refueled in about five minutes, similar to a gasoline car. The Hyundai Nexo, another hydrogen fuel cell SUV, is rated at 61 MPGe combined, slightly lower than the Mirai. The Toyota Prius Prime plug-in hybrid achieves 133 MPGe combined when running on electric power, but switches to gasoline once the battery is depleted, fundamentally changing its efficiency profile. The Mirai’s advantage is that it is a zero-emissions vehicle from start to finish, a critical factor for buyers in California who are committed to reducing their carbon footprint; data for all Toyota fuel economy is available here.

Tips to maximize efficiency

Driving the Mirai efficiently depends on maintaining consistent speed and avoiding hard acceleration. Just like with any electric vehicle, aggressive driving drains the battery faster, affecting the range. Plan routes strategically and avoid unexpected stops that require sudden bursts of speed and energy.

Precondition the cabin while the car is plugged in (if possible). This will reduce the energy demand on the fuel cell system once you start driving. Use the climate control system sparingly, or use the seat heaters to stay comfortable without taxing the system. It is designed as an luxury sedan and offers those features that might affect mileage.

Take advantage of regenerative braking. The Mirai uses regenerative braking to capture energy during deceleration and return it to the battery, helping to extend range. Anticipate traffic flow and gently lift off the accelerator to maximize this effect. The more you anticipate slowdowns the more electricity you recover.

Ensure proper tire inflation. Under-inflated tires increase rolling resistance, reducing efficiency. Check your tire pressure regularly and inflate to the recommended level. Tire pressure has a huge effect on electric vehicle range, since every little bit makes a difference.

Keep the vehicle’s weight down. Remove unnecessary items from the car to reduce the load on the powertrain. Excess weight requires more energy to accelerate and maintain speed, impacting overall “fuel economy.” However, since storage space is limited, this should not prove to be a challenge.