According to the Fueleconomy.gov website (the official U.S. government source for fuel economy information), the list of the top ten most fuel efficient light vehicles includes nine electric vehicles and one plug-in hybrid-electric vehicle.
Electric vehicle fuel economy is measured in miles (1m=1.61Km) per gallon (1gal=3.785l) equivalent, or MPGe, where 33.7 kilowatt-hours of electricity is equal to one gallon of gasoline.
The Hyundai Ioniq Electric, with a combined city/highway fuel economy of 136 MPGe tops the list for model year (MY) 2017.
Three vehicles tied for the fifth spot on the list – the Fiat 550e, the Mitsubishi i-MiEV, and the Nissan Leaf – with 112 MPGe.
The BMW i3 REX, a range-extended electric vehicle, has a combined gasoline/electric city/highway fuel economy rating of 88 MPGe.
Top Ten Most Fuel Efficient Vehicles for 2017
Hyundai Ioniq Electric — 136MPGe (57,84KM/l)
BMW i3 BEV (60 Amp-hour battery) — 124MPGe (52,42km/l)
Chevrolet Bolt EV — 119MPGe (50,61KM/l)
BMW i3 BEV (94 Amp-hour battery) — 118MPGe (50,19km/l)
Fiat 500e — 112MPGe (47,64 Km/l)
Mitsubishi i-MiEV — 112MPGe (47,64 Km/l)
Nissan Leaf — 112MPGe (47,64 Km/l)
Kia Soul EV — 105MPGe (44,66 Km/l)
BMW i3 REX (94 Amp-hour battery) 0.6 L, 2 cyl — 88MPGe (39,98 Km/l)
Mercedes-Benz B250e — 84MPGe (35,73 Km/l)
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