To start, Hyundai slightly revised its estimated fuel economy numbers for the Sonata Hybrid to 36/40 city/highway mpg — down 1 city and up 1 highway. Against the likes of the Ford Fusion Hybrid and Toyota Camry Hybrid, the highway number is right at the top of the class. Then there's range. Given the Hyundai Sonata Hybrid's 17.2-gallon tank, you could theoretically roll more than 680 highway miles between fill-ups. latest news today.