Aveo is very fuel efficient.
It's a good little car, but it does have it's problems. The car is mostly plastic and some parts that are meant to get hot have melted because they were not made of metal; the temperature gauge casing. Once you have the casing replaced with a metal one, it works fine. Great gas mileage, about 28-30 miles per gallon. Front and back bumpers are all plastic and will scrape and break easily when hit.