The 133 MPGe EPA rating places the 2020 Toyota Prius Prime into a lofty space of high-mileage plug-in hybrid vehicles, including the Hyundai Ioniq, Honda Clarity, Kia Niro and the now-defunct Chevrolet Volt.
Plug-in vehicles sales (pure battery electrics and plug-in hybrids) hit a speed bump after a meteoric rise in 2018, dropping from 361,300 to 325,800.
The ACEEE (American Council for an Energy-Efficient Economy) uses its own methodology to determine the most environmentally friendly cars offered for sale. This year they picked 12 top candidates, including the expected electric cars (EVs), but also a variety of gasoline-electric hybrids, topped by the Toyota Prius Prime plug-in hybrid.