finding a new vehicle?

hi, ive been vehicle searching for months now, and well, i have some difficult criteria.
must have medium (23-24+ highway) to good (30+ highway) gas mileage (i'm trying to go for sort of environmental vehicles)
here's where it gets hard...
i like room, so SUV's are good,
i can only buy $20000 or less vehicles.
vehicles that have automatic transmission.
rear wheel drive and all wheel drive is also preferred.
and only cars that have 4 doors and pretty good space.
preferably something a bit tough.
i'm buying used.
toyota, honda, hyundai, gmc and chevrolet are most accepted.

C7S2009-05-06T19:18:00Z

Favorite Answer

Honda CR-V gets 27mpg highway for AWD and 28mpg for FWD.
Toyota Rav4 gets 26mpg highway for AWD.

Saturn Vue and Ford Escape and Mazda Tribute are the most fuel efficient Hybrid and Non-Hybrid SUV's available.
All get 30mpg highway or better.