Would this help, Kammback Spoiler for a HONDA FIT
 

I have a base 2010 Honda Fit and by basic sensible driving i am able to achieve ~43 mpg (40 psi tires, all stock no mods). I particularly bought the base fit without a spoiler as the one on the sport kind of protrudes slightly upwards and might create drag.
While i would love to have the one below, it is not going to be practical.

http://i53.photobucket.com/albums/g5...dafitidea2.jpg

Luckily there is an option for an accessory for Japanese Fits that looks great, pictured below;

http://i53.photobucket.com/albums/g5...mageFromDB.jpg

I like how it follows the roof line, do you guys think it will help with some mpg gains??

rav -

From what I can see I like it. I want a side view and some "seam details". I am guessing it would have a long payback time, but spoilers are also an aesthetic thing.

I could even imagine a clear plexi/lexan extension that could get you closer to the example picture you like.

CarloSW2

I agree with you, unfortunately i do not have any side pics of it.

The basic function of such spoilers and Kammbacks is to extend a surface while tapering it in, thereby reducing the wake. The further you extend these lines and the more you taper them in, the smaller the wake and the more benefits you'll have.

As the spoiler is very short and hardly tapers in, the gains will be minimal.

totally agree with you. I guess, it's time to get busy with some plexiglass!!