10 Sporty Cars With Great Fuel Economy Published on May 26, 2023 in Top 10 by The Car Guide Photo: Guillaume Rivard 2023 Mazda MX-5 The legeendary two-seat roadster is all about lightness, efficiency and fun. The 181-hp MX-5 achieves 7.9 L/100 km with the optional six-speed autobox.