When considering only full-line automakers, which comes to mind as the most fuel efficient in the entire country? It’s not only car shoppers who like to know; the government does, too, and every year it uses a lot of data collection and math to figure out exactly that, and the winner this year is… Honda. You can see exactly how the US Environmental Protection Agency came to its conclusion in its very comprehensive annual report, the 2025 Automotive Trends Report.Here is the highlight for those who don’t like swiping through giant pdf files: Honda achieved a US fleet average “real world” fuel economy of 31.0 miles per gallon for the 2024 model year, 3.8 mpg higher than the industry average, which takes into account only automakers that offer a full lineup of gasoline-powered and electrified vehicles.Honda’s fuel-efficiency leadership actually dates back nearly five decades. When the EPA first ranked America’s most fuel-efficient vehicles in 1976, the Honda Civic topped the list. Since then, the company has consistently placed among the leaders in annual EPA measurements.Most Fuel-Efficient Full-Line Automaker in the USbar graph comparing fuel economy of various automakersThe 2025 report also highlights Honda’s strategy of improving efficiency while keeping vehicles affordable. In 2025, the average transaction price for a new Honda vehicle was $35,060, roughly $10,000 below the industry average.Honda’s performance in the EPA rankings comes as the company continues to expand its electrified lineup. In 2025, Honda set a third-consecutive annual sales record for electrified vehicles in America, surpassing 400,000 units for the first time. Hybrid models led the charge, including the CR-V hybrid, Accord hybrid ,and Civic hybrid.The automaker employs more than 30,000 people in the United States and operates 12 major manufacturing facilities. In 2024, nearly two-thirds of all Honda and Acura vehicles sold in the US were built domestically. Honda says it also works with 665 US OEM suppliers and conducts research and development at 21 facilities across the country.Honda says its long-standing approach of building products close to customers and investing in fuel-efficient technologies has helped it maintain its position at the top of the EPA rankings while remaining competitive on price.