You guys are going to say I'm full of it but I'll remind you I drive for a living and fuel mileage is a big deal when you drive a semi-truck that gets 6 to 7 MPG. I average about 21 MPG in my 5spd GT but I left home one day during a pretty good rain storm and drove 186 miles. I kept my speed below 60 the entire trip and took it real easy on the throttle. My mileage came out 30.7 MPG when I pulled into Oklahoma City. I suspect that's about as good as it's ever going to get.
so...I totally wasn't lying with that. I babied my '06 like crazy and I took fairly frequent long trips. I got really, really good at drafting behind semis while riding the clutch and getting 4 or 5 miles with the engine spinning free before I would have to engage the gears again. I drove over to Indy for the 500 in 2009(..it was '08 or '09) and I got behind a convoy of trucks and drafted my blocker at 75mph for 150 miles. It really did get 51mpg.2006 v6 routinely had 36-38mpg.
trip from Columbus Ohio to Indianapolis was at 51mpg