Top 10 Most Fuel-Efficient Hybrid Cars Published on May 20, 2019 in Top 10 by Frédéric Mercier Photo: Chevrolet 7. Chevrolet Malibu HybrideOne of the few American cars to make our list, the Malibu Hybrid stands out with a combined rating of 5.1 L/100 km, including a rather impressive 4.8 L/100 km in the city.