what is the most fuel efficient hybrid vehicle?
['Hyundai Ioniq Blue — 58 mpg. ... ', 'Toyota Prius Eco — 56 mpg. ... ', 'Toyota Prius Prime — 54 mpg. ... ', 'Honda Insight — 52 mpg. ... ', 'Toyota Camry Hybrid LE — 52 mpg. ... ', 'Pros and Cons of Hybrid Cars. ... ', 'What Is a Plug-In Hybrid? ... ', 'Hybrid Cars vs.']