New Lexus GS 450h Price, Photos, Review & Availability New Lexus GS 450h is powered by the V6 engine and revised hybrid system,Lexus GS 450h is available in three engine variants with better fuel economy.The Fuel efficiency of GS 450h claims 29 mpg city and 34 mpg highway.GS 450h sprints 0-60 Mph in just 5.2 [...]