I finely fixed the link on my web page for the Road and Track article where they took a metro xfi to one of those fuel mileage competitions where they acheave thousands of miles per gallon with single person vehicles, and ran a xfi, and a civic vx on the same track, under the same conditions, it's a few years old, maybe 1995 or so.
http://nbtsc.org/~ryland/RoadAndTrackArticle/