Hyundai Tucson is one of the best gas mileage SUV's. It's average is 22 city/30 highway. It's a crossover but it's still one of the highest gas mileage per gallon when compared to the Toyota RAV 4 and Ford Escape or Honda

Plus it's prettier. LOL. It's the vehicle I plan to get when I save enough for a huge down payment. It's got a 14.5 gallon tank and its range in miles is 22 (city) mpg / 31 mpg (hwy) / 26 mpg (combo) and approximately: 333.5 mi. (city) / 449.5 mi.(highway / 377 mi. (combo) So smaller tank than most, but still better gas mileage.

To compare the Ford Escape's average is 22 mpg / 28 mpg / 24 mpg; Range in Miles: 363 mi. / 462 mi. / 396 mi. with a 16.5 gallon tank.
Honda CR V is 21 mpg / 28 mpg / 24 mpg; Range in Miles: 321.3 mi. / 428.4 mi. / 367.2 m with a 15.5 gallon tank.