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Old 06-19-2009, 04:04 PM   #5 (permalink)
Master EcoModder
Join Date: Mar 2009
Location: Northeast Ohio
Posts: 269

The Wife's Hot Rod - '09 Pontiac G8 GT
Last 3: 23.22 mpg (US)

Big Outback - '13 Subaru Outback 2.5i

Little Outback - '02 Subaru Impreza Outback Sport
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I believe it was MetroMPG who did a similar test on another car using Airtabs. Seperation results were the same as yours.
He also tested airtabs on a minivan of some persuasion. In both cases there was no difference in mpg.
Putting the VG's in an area of seperated flow (Maybe the back edge of your deck lid) would be useless.

I cannot tell a difference between extension & not from the pictures.
Are you planning on making the extension adjustable for testing or putting VG's at the rear of the extension?
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