<Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (May 2010) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (May 2010) (Learn how and when to remove this template message) </Td> </Tr> <P> A spoiler is an automotive aerodynamic device whose intended design function is to' spoil' unfavorable air movement across a body of a vehicle in motion, usually described as turbulence or drag . Spoilers on the front of a vehicle are often called air dams . Spoilers are often fitted to race and high - performance sports cars, although they have become common on passenger vehicles as well . Some spoilers are added to cars primarily for styling purposes and have either little aerodynamic benefit or even make the aerodynamics worse . </P> <P> The term "spoiler" is often mistakenly used interchangeably with "wing". An automotive wing is a device whose intended design is to generate downforce as air passes around it, not simply disrupt existing airflow patterns . As such, rather than decreasing drag, automotive wings actually increase drag . </P>

What is the purpose of spoilers on cars