What is the difference between an automotive spoiler and an automotive wing? Is there a difference? My understanding has always been that a wing is an airfoil, and is used to produce downforce, while a spoiler is is just a lip that is used to reduce drag by creating a pocket of stagnant air. This is what people on the car forums seem to think as well. Is there anyone with actual fluid mechanics experience that can give a more insightful perspective into this?