There are a variety of features that help the Stingray post an EPA estimate higher than the C6's 26 MPG, but the key component is the cylinder deactivation in the 6.2L small-block V8.The car recognizes when you're driving in touring mode, on the highway for example, and seamlessly will shut down four cylinders, turning the engine into a 3.1L four-banger. Simply, if the driving conditions don't require V8 power, there's no need for it, a philosophy that gives the Corvette a great advantage in the fuel economy department.