The
rear wheel skirts "test" I ran on my Firefly (Metro) was kind of sloppy: first of all, it wasn't an A-B-A. The skirts were added on top of another significant variable (grille block), so they weren't tested independently. (That made it actually an A-B-BC test.)
Out of curiousity I'm going to re-run the test. I'll be using a different car this time as well: 2007 Toyota Corolla automatic.
Click to zoom...