An engineer for the Chevrolet Cruze Eco explains the vehicle's unique aerodynamic features that help it to earn 42 mpg highway.<br /><br /><br /><img src="http://ll.broadbandsports.com/images/43645_thumb.jpg" alt="Chevrolet Cruze Eco: How it achieves 42 mpg" title="Chevrolet Cruze Eco: How it achieves 42 mpg" width="150" height="90" alt="Chevrolet Cruze Eco: How it achieves 42 mpg"/>
