List of Most Efficient Cars in 2022 Dominated by Electric Vehicles

List of Most Efficient Cars in 2022 Dominated by Electric Vehicles

Originally published by Oak Ridge National Laboratory.

The 2022 Fuel Economy Guide, published by ORNL for the DOE / EPA website, provides up-to-date information on fuel economy, environmental and safety data so consumers can choose the most fuel-efficient vehicle that meets their needs. Credit: Andrew Sproles / ORNL, US Department of Energy

As the holiday roadtrip season approaches and more workers head back to offices and daily commutes, the Oak Ridge National Laboratory has released the federal government’s new 2022 Fuel Economy Guide. The report provides the latest fuel efficiency statistics and money-saving tips for new and used vehicles.

For the first time, two electric vehicles with a range of 500 kilometers sit at the top of the guide’s 10 most fuel-efficient vehicles.

The top 10 “fuel suckers” among the 2022 models in the new guide are all-electric vehicles that boast a minimum of 111 miles per gallon-equivalent of fuel economy. The guide is part of the website, maintained by ORNL for the Department of Energy and the Environmental Protection Agency.

With more electric vehicles on the market than ever, has new features this year to help customers choose the best electric car for their needs and budget. A new tool allows consumers to view upstream emissions related to their vehicles by zip code. This feature allows users to see how the methods of electricity generation in their area affect their total greenhouse gas emissions. Another tool allows electric car owners to track their fuel efficiency in either kilowatt-hours or miles per gallon equivalents.

The website is DOE’s most visited and attracts more than 30 million user sessions in the 2021 model year – more than any year since 2015. The site provides consumers with information to help guide purchasing decisions for all types of vehicles, including current EV federal tax deductions and operating and maintenance tips to save drivers money. For example, consumers can adjust estimates for their annual miles and local fuel prices.

The fuel economy label on new car windows contains the same data as in the fuel economy guide, and the label’s QR code will show the specific vehicle with further information from the website. ORNL researchers are also working on launching phone apps for

Interest in electric cars is clearly increasing as more models come on the market. In fact, 44 of the top 50 vehicles searched on in the fiscal year 2021 were hybrids or fully electric.

But the fuel economy of many conventional gasoline-powered vehicles also continues to rise, according to Stacy Davis, who heads the and Fuel Economy Guide projects at ORNL. Four of the models on the guide’s “best in class” list of cars by size are conventional fuel.

Gone are the days when consumers who wanted the most fuel-efficient vehicle were encouraged to drive the smallest available cars, Davis said. Today, with advanced engines and powertrains, customers can use the wizard to enter the car size that best suits their needs, and will provide a comparable list of vehicles and their fuel efficiency assessments to help guide decisions.

“I think as our choice of vehicle types increases, especially with new electric powertrains, it’s more important than ever to understand the specifications of the vehicles you have the opportunity to buy,” Davis said.

UT-Battelle administers ORNL for the Department of Energy’s Office of Science, the largest single supporter of basic research in the physical sciences in the United States. The Office of Science is working to solve some of the most pressing challenges of our time. For more information, please visit

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