Appointments & care. At Mayo Clinic, we take the time to listen, to find answers and to provide you the best care. Respiratory syncytial virus (RSV) is a virus that causes infections of the lungs and respiratory tract.
2015 Hyundai Sonata Eco: Gas Mileage Review. The 2015 Hyundai Sonata Eco is the Korean maker's most fuel-efficient mid-size sedan that doesn't use a hybrid powertrain. And it highlights the two parallel paths that automakers are taking as they work to boost gas mileage ratings to meet steadily rising corporate average fuel economy rules.
But much to their credit, Hyundai focused on those problems for the 2013 Sonata Hybrid. The result is a top-notch, fully competitive hybrid sedan to take on the competition. Starting at $25,650, the Sonata Hybrid's same 2.4-liter four-cylinder engine carries over for 2013, but its output drops from 166 to 159 horsepower.