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.
Fuel efficiency is sure to be a top reason for purchasers of the Sonata Hybrid Limited, and we think they'll be pleased with its 39/43 mpg city/highway fuel economy rating. The base Sonata Hybrid offers slightly better fuel economy ratings of 40/44 mpg.