23 Most Fuel-Efficient Sedans

2019 Hyundai Elantra Eco
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23) 2019 Hyundai Elantra Eco

35 mpg | Est Annual Fuel Cost: $1,150 | U.S. News Overall Score: 8.3/10 (2018) | $20,950

The 2019 Hyundai Elantra Eco trim just makes the cut on our list, earning 32 mpg in the city and 40 mpg on the highway. The Elantra Eco comes with a 128-horsepower turbocharged four-cylinder engine and a seven-speed automatic transmission.

For comparison, the base Elantra comes with a 147-horsepower four-cylinder, and it earns 28 mpg in the city and 37 mpg on the highway.

The Elantra has a history of strong reliability and lots of available features, including advanced safety and infotainment systems. Front seat space is excellent, but rear legroom is middling for the class. The Elantra received a significant refresh for 2019 that included new styling inside and out.