As Americans move away from massive, gas-hogging SUVs, more and more driveways and parking lots are populated by crossovers, both compact and full-sized.

Based on cars chasses, crossovers offer the roominess, flexibility and elevated driving position of SUVs while providing the ride, handling and — most importantly — fuel economy of a car.

The size of the crossover does not strongly correlate to fuel economy. Full-sized and compact crossovers alike generally deliver around 20 mpg in combined driving. The smaller vehicles do a little better, but not significantly