GM, Stellantis rank as worst automakers for fuel efficiency, even amid EV push, EPA says
Both automakers decreased their fuel economy and increased C02 emissions since the 2016 model-year, as did Hyundai Motor, Mazda and Volkswagen.
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Both automakers decreased their fuel economy and increased C02 emissions since the 2016 model-year, as did Hyundai Motor, Mazda and Volkswagen.
