The 2015 Hyundai Sonata Eco is a mid-size sedan that was part of the sixth-generation Sonata lineup produced by Hyundai. It was introduced as a more fuel-efficient variant of the Sonata, focusing on improved fuel economy without sacrificing performance. The car holds a clean title with low miles. 

Here are some key features and specifications of the 2015 Hyundai Sonata Eco:

1. Exterior: The Sonata Eco features a sleek and modern design with aerodynamic lines. It has a distinct front grille, stylish headlights, and a sculpted body.

2. Engine: The Sonata Eco is equipped with a turbocharged 1.6-liter four-cylinder engine. This engine produces 177 horsepower and 195 lb-ft of torque. It is mated to a seven-speed dual-clutch automatic transmission.

3. Fuel Efficiency: The primary focus of the Sonata Eco is its fuel efficiency. It achieves an EPA-estimated fuel economy rating of around 28 city mpg and 38 highway mpg. These numbers may vary depending on driving conditions and individual driving habits.

4. Interior: The cabin of the Sonata Eco offers a comfortable and spacious environment. It can accommodate up to five passengers. The seats are supportive and well-cushioned, and the overall interior design is user-friendly. Standard features include cloth upholstery, air conditioning, power windows, and a six-speaker audio system.

5. Technology and Safety: The Sonata Eco comes with several standard and available features to enhance comfort, convenience, and safety. Some notable features include a rearview camera, blind-spot monitoring, rear cross-traffic alert, Bluetooth connectivity, USB ports, and an infotainment system with a touchscreen display.

6. Handling and Ride: The Sonata Eco provides a smooth and composed ride quality. The suspension is well-tuned to balance comfort and agility. It offers responsive steering and confident handling, making it suitable for both city driving and longer highway trips.

7. Trim Levels: The Sonata Eco is a specific trim level within the 2015 Sonata lineup. Other trim levels available for the 2015 Sonata include the base GLS, SE, Sport, and Limited.

It's important to note that the information provided here is based on the general specifications and features of the 2015 Hyundai Sonata Eco. For more detailed and up-to-date information, it's recommended to consult official Hyundai documentation or visit a Hyundai dealership.