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Well congratulations...been discussed on this site several times, other sites, television, etc... it has been proven to have negligible differences and to be a myth. Not going into it any further due to all the truthful info available. I think your username is perfect for you...completely "baffled" but this subject. If you want to know more about the subject, do a search. Sorry for the hijack cliff.
So nice that you need to resort to infantile name calling and insults.
That really shows your maturity level.
the tone sometimes (being a newbie) makes me think a bit before posting. Like we should know all of this stuff already. Sorry I can't help you, just thought I'd support you....
If it gets u extra mileage do it, no matter how many times its been debunked. Personally, I always lower my tailgate on trips and I do notice a difference. But the "toolshed on wheels" holds true, head winds are killer