The other day, while at my friendly neighborhood Mazda dealer I got a look at the backend of a 2012 Mazdaspeed 3. It was beautiful!
What I couldn't help thinking was that it looked something like the spoiler talked about in this article that supposedly decreases drag by 6%:
Green Car Congress: Novel Spoiler Design Reduces Fuel Consumption for Minivans, SUVs
Does anybody have any insight into whether this is the case? Is this the same or a similar spoiler? What effect does it have in real life?