[mpg_numbers_guy]

Looks good! Really clean civic too, most of them around here are beat up or riced up junkers.

Regarding the air dam on the Prius, the Prius has a smoother underbody than most cars, so there isn't enough aero improvement to make up for the added frontal area. I haven't tried one on the Insight, but I surmise it would hurt economy there as well. I did notice an improvement with one on my Civic that looked pretty similar to deluxx's.