[MetroMPG]

Hi Rooster - if I were trying to fix an aerodynamic problem, I'd definitely use the VG's like the ones you show, or the "delta" style VG's that Mitsubishi used on the EVO. For the reasons stated.

That said, let's remember: the famous Mitsu paper showed only an infinitesimally small Cd improvement even when its delta VG's placement & size were optimized through computational fluid dynamics.