Ordinary gas- and diesel-powered cars are capable of sky-high EPA fuel economy ratings—without batteries or electric motors.

Despite continuing advancements in hybrid and electric-car technology, the good old-fashioned internal-combustion engine remains relevant. In fact, affordable, fuel-efficient gasoline-powered cars still outnumber electric cars, and they have a lock on the under-$30,000 category. For those interested in having less of a negative impact on the environment without completely letting go of gas or diesel engines, here are 10 of the most efficient gas-only models you can buy today.
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https://www.caranddriver.com/features/g15382442/best-gas-mileage-nonhybrid-cars-gasoline-nonelectric/