Since the benefit of turbulators/VG's on the trailing edge of a vehicle isn't generally accepted, only an A-B-A test will satisfy most members here about their impact. (On the other hand, most people wouldn't be as skeptical about an air dam for example, since they're an established & well understood modification.)
It's great that your tank-to-tank numbers increased but there are too many variables in that type of comparison to be convincing.
Just FYI, this thread describes "ideal" testing:
http://ecomodder.com/forum/showthrea...ery-11445.html
What about those wheel discs - are they commercial ones painted to match, or did you DIY them from scratch?