New car mileage

We rented a new Chevy Malibu a couple weeks ago on vacation. We averaged 31.2mpg over the 450 miles we put on it. I'd say 60% of that was highway, which 1/2 of was stop and go rush hour highway traffic.

The Malibu is definately not as nice as they used to be, cheaper overall feel, radio didn't sound very good, controls not that intuitive, somewhat underpowered when trying to merge onto the highway....