Top 10 Top 10 Most Fuel-Efficient Hybrid Cars by Frédéric Mercier May 20, 2019 Photo: Lexus9. Lexus ES 300hLexus still does not offer a fully electric vehicle, but as Toyota's luxury brand it sells quite a lineup of hybrid models. The ES 300h is the most efficient at 5.3 L/100 km. « PreviousNext » Share on Facebook Share: