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.
Pure heptane has two main uses. The first use is as the standard zero point for the octane rating scale for gasoline. As a driver, you may have noticed that higher octane fuel is more expensive because it is better for your engine. You can correctly conclude that a fuel rated zero octane would be terrible for your car.