With a combined EPA rating of 74 MPG, the 2022 Toyota Mirai LE is highly efficient. It operates on a hydrogen fuel cell vehicle (FCEV), which means that “MPG” technically refers to MPGe, or miles per gallon equivalent. This isn’t about squeezing the most out of gasoline; it’s about maximizing range and minimizing environmental impact through technology that converts hydrogen into electricity to power the vehicle.

City and highway performance

The Mirai LE’s efficiency is consistent across different driving environments. The EPA estimates 76 MPGe in the city and 71 MPGe on the highway. This consistency results from the electric motor’s inherent efficiency and the hydrogen fuel cell’s ability to operate effectively across varied power demands. Gasoline engines lose efficiency in stop-and-go traffic, which explains the slightly superior city rating. On the highway, maintaining a steady speed allows the fuel cell to operate within its optimal range, further contributing to the vehicle’s economy. For drivers who frequently navigate urban environments or commute on open highways, the Mirai LE provides predictable range.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2022 Toyota Mirai LE to be $709. This calculation is based on driving 15,000 miles per year, using a national average fuel price, the equivalent cost of hydrogen at the time of calculation. This number can fluctuate depending on local hydrogen prices, which vary greatly by region and availability. Even with fluctuating prices, the Mirai’s exceptional MPGe ensures that its fueling costs remain substantially lower than those of traditional gasoline-powered vehicles and even many hybrid models. For those seeking to minimize their long-term running costs and embrace a more sustainable transportation solution, this low annual fuel cost is attractive.

Real-world expectations

While the EPA estimates provide a standardized benchmark, real-world fuel economy can vary depending on driving style, road conditions, and environmental factors. Hard acceleration, frequent hard braking, and sustained high speeds can negatively impact the Mirai’s MPGe. Similarly, extreme temperatures can affect the efficiency of the hydrogen fuel cell. However, drivers who adopt a smooth driving style, minimize unnecessary idling, and make use of the regenerative braking system can often achieve or even exceed the EPA’s estimates. Regular maintenance, including proper tire inflation and timely filter replacements, can also help to optimize the vehicle’s efficiency. Ultimately, the Mirai’s real-world fuel economy hinges on the driver’s commitment to efficient driving practices.

How it compares

The Toyota Mirai LE occupies a unique space in the automotive market. It’s not directly comparable to traditional gasoline vehicles or even most hybrids. Its closest competitors are other hydrogen fuel cell vehicles, such as the Hyundai Nexo, which achieves an EPA-estimated combined rating of 61 MPGe. The Mirai’s superior fuel economy provides an advantage for those prioritizing efficiency and cost savings. Within Toyota’s own lineup, you can compare the MIRAI MPG across all years. It is also critical to understand that while electric vehicles like Tesla’s Model 3 offer similar zero-emission benefits, they rely on battery electricity, whereas the Mirai produces its own electricity on board via hydrogen. For drivers who prioritize long ranges and quick refueling times (hydrogen fill-ups take only a few minutes, unlike EV charging), the Mirai presents an alternative. Those interested in all Toyota fuel economy data will find that the Mirai offers the most efficient options among current production vehicles.

Tips to maximize efficiency

Smooth and consistent acceleration is key to maximizing the Mirai’s fuel economy. Avoid sudden bursts of speed, and gradually increase your pace to conserve hydrogen. Anticipate traffic flow and maintain a steady speed whenever possible.

Regenerative braking plays an important role in capturing energy that would otherwise be lost during deceleration. Use the regenerative braking system by gently lifting off the accelerator pedal when slowing down. This returns energy to the battery, extending your range and reducing hydrogen consumption.

Minimize your use of climate control features. Heating and air conditioning require energy, which can impact the Mirai’s fuel economy. Use these systems sparingly, or opt for features like seat heaters to stay comfortable without placing a heavy load on the fuel cell.

Pay attention to the information displayed on the vehicle’s energy monitor. This provides real-time feedback on your driving efficiency, allowing you to adjust your habits and optimize your fuel economy. Use this information to learn which driving techniques are most effective in conserving hydrogen.

Ensure that your tires are properly inflated. Under-inflated tires increase rolling resistance, which negatively affects fuel economy. Check your tire pressure regularly and inflate them to the recommended levels.