Trucks are not exactly known for their great fuel economy, which to some savvy drivers, is all the more reason to try to maximize your efficiency.
One technique to lower air drag on the highway seems intuitive-- lower the tailgate so it isn't blocking air.
But is it blocking air flow? Find out how truck aerodynamics really work at the Ford Motor Company wind tunnel.
What you can't see happening with the naked eye, is that with your tailgate up, a sort of air pocket forms in your cargo box, allowing moving air to glide over the top…