Lexus Offers 2 Of The 10 Most Fuel Efficient Automobiles In The US? Sort Of

2011 Lexus RX450h ? A large adn luxurious fuel miser with enough fuel economy capability to make a CleanMPG family happy. The EPA and DOE released their list of top 10 fuel-economy leaders for 2011, which just so happens to include two Lexus hybrids.