Small cars abound at NY show, but will they sell? - Yahoo! Finance I love how they mention that 19 mpg combined Buick Enclave "crossover" SUV. Crossover is such a fuzzy definition these days. I hate how the press refers to crossovers as being "fuel efficient". I guess they range from a little more efficient than monstrosity class SUVs to a lot more w/ones like the Pontiac Vibe/Toyota Matrix.