Question of the Day: Why is My Subaru's Mileage Low?

We had a driver in a brand-new 2008 Subaru Impreza ask us why his car wasn’t giving him the gas mileage promised on the sticker when he bought the car. In fact, he says it's getting five to 10 mpg less than advertised. It could be, however, that the engine is still calibrating and adjusting. Ask.cars.com explains what this means.

Why is my Subaru's mileage low? (Ask.cars.com)