1. Subaru XV Crosstrek Hybrid AWD - 31 MPG Combined
The most fuel-efficient crossover or SUV available on today’s market is the Subaru XV Crosstrek Hybrid. Powered by the same 2.0-liter four-cylinder engine found in the standard XV Crosstrek, the hybrid variant also features an electric motor that gives it a total system output of 160 hp and 163 lb-ft of torque. Its affordable too with a starting price of $26,820. Best of all, you’ll get 29 MPG in the city and 33 MPG on the highway, making the XV Crosstrek Hybrid good for a 31 MPG combined rating.