When I make my trips from Chicago to Ann Arbor Michigan I get about 330-370 depending on speed. I have gotten 370 miles once last year going between 75 and 80 most of the way there. And yes I do have a V6 ATX.

99 Mystique LS T-Red ATX Duratec Mods: Hella stereo Mods K & N air filter w/intake pipe www.sounddomain.com/id/jongordo8