33 City / 41 Highway / 36 Combined

Here’s a nice easy one: Every version of the 2020 Kia Rio returns 36 mpg combined. Of course, there are only two variants, each featuring a naturally aspirated 120-hp 1.6-liter engine and a continuously variable transmission, but that’s beside the point. Prices for the base Rio LX start at $15,850, although we’d suggest grabbing the $16,490 Rio S, which is just as efficient but carries a better load of equipment.