Well i had some time to kill last night so my buddy and i went and looked at cars and trucks. he wants a 350Z and im looking a dodge ram. Well i get there and a very nice salesman lets me test drive an 08 2500 quad cab, 6.7CTD auto. The truck is awesome...has a lot of power from what i could tell. The only thing is im wondering how the gas mileage is. Its got an auto tranny and 4.10 rear axel. What kind of mileage would i get. Also is it illegal or able to be done to cut out the exhuat and make it loud.?