2013 GS 450h EPA-rated at 31 mpg combined; 35% improvement over preceding generation
Green Car Congress
AUGUST 24, 2012
2013 Lexus GS 450h. Lexus’s 2013 GS 450h—the new generation hybrid version of the GS 350, introduced at the 2011 Frankfurt Motor Show ( earlier post )— offers EPA-estimated fuel economy ratings of 29 mpg US city, 34 mpg US highway and 31 mpg US combined (7.7, These figures represent a 32%, 36% and 35% improvement in fuel economy, respectively, compared to the prior generation of the GS 450h (e.g., Click to enlarge.