I just read the article about the Ford Pinto they modded back in 1974. That one on the main page. So they added a small spoiler. This saves 7%. The pinto and the Swift/Metro have (almost) the same shape. SO i was sondering will a spoiler also give a better FE to a Swift/Metro?
This looks to be easy installed. Little bit metal "L"-shaped profile and some scru's (and some paint).