I am trying (and still doing) it. It seemed to work the two tanks, but it's nothing scientific. I saw the results from a Beetle here (
http://ecomodder.com/forum/showthrea...ted-26915.html), and know the success of boattails, so it only seemed fitting.
I know it works (in my head I know it...lol) and I am not really caring about testing. It doesn't matter to me if it is a little or a lot, I will fine tune and maybe test when it's warm. As it gets colder here (in Northern Ohio), my mileage will drop. In the Mustang it stayed the same or went up, as I continued to mod- so when I got to warm weather, it was great- I am planning the same with the Insight.