11. 2017 Toyota Prius Prime
If you think that the Prius is the only the most fuel-efficient member of the family, well think again. There’s room for another fuel-efficient entry, the 2017 Toyota Prius Prime, which is actually the plug-it version of the Prius hatchback. This comes with a larger battery that works with a 4-cylinder gas engine and electric motor, which can deliver up to 25 miles in electric-only driving, which is an improvement from the previous plug-in. And for car owners and shoppers who are asking about the significance of the name, well this is dubbed Toyota Prime because it represents the company’s best results when it comes to efficiency and performance. According to many tests, the EPA electricity combined for the Prius Prime is 133 MPGe.