The Kia Optima has always been a reliable and fuel-efficient car but lacked an exterior design to make it stand out. A recent design update gave the Optima the looks it needed with aggressive styling and a more powerful engine, while retaining an attractive and comfortable interior. Although the Kia Optima is a midsize sedan, it provides fuel economy similar to most compact vehicles with a spacious and roomy cabin surprising in a sub-$20,000 car. The Kia Optima comes with a 10-year/100,000-mile powertrain warranty and gets an estimated 32 mpg on the highway.