"Isn't the EPA going to be downgrading the mpg of every vehicle for 2008?"
Not exactly. They're revising their testing methods. What you'll see is some cars came out "optimistically" rated, oh I don't know, say a Prius, will come out much worse on the test. Others may only drop 1MPG, if that. It has to do with a lot of variables. Such as the original testing and how hard they drove it. Weight of the vehicle, engine size, tranny speed, etc. From what I've read, the testing is now more real world and should reflect a lot closer to what people were actually already getting. I think it includes now some 70-75 mph tests. While technically over the speed limit, it's real world...