View Single Post
Old 11-04-2012, 03:18 AM   #2303
Scooby Newbie
Member#: 316658
Join Date: Apr 2012
2012 Impreza limited
5dr silver


Originally Posted by flyboy1100 View Post
Just a quick comment here, I agree with a lot of your points of your whole post. But the first question there is a vortex generator on the back of the roof rail to offset the fresh created by the rails
I've seen the video with the Subaru spokes person claiming that the little tail stub at the end of roof rail improve the mpg by 1.
I don't think there was any claim that the little stub completely offsets the mpg cost of the adding the rails.
Anyway, maybe all these things are within margin of error, or they are all fractions of mpg numbers so the don't ever show up when you look at each of these individually.

But if you look at all the things I mentioned, the sum of all these difference has to amount to some MPG difference, yet we see NO DIFFERENCE.
* Registered users of the site do not see these ads.
bobdole888 is offline   Reply With Quote