Well I drive about 214 miles a day to work and back and it almost all interstate. My 13 gt was a manual with 3.73's and I liked it better overall for trying to get mpgs. In town engine coasting above 1500 rpms would shit the fuel injection off which helped alot. My 15 is an A6 with 3.15's and it...
I have gone about 430 miles on one tank of gas. Still had about a gallon of gas left in it too. I normally get about 330 to 350 mile on a tank if I have mixed driving. You can see all my mpg's I have tracked here.
Are you sure the door skins are aluminum? I thought that the door skins were still steel. When I was putting exhaust on i had a little led light with magnets and placed it on the fender thinking it would stick and it didn't so I used the door. Idk?
I think the aluminum is a good guess since the front fenders are already aluminum and the front, rear, and door skins all have the ZG8S0010 code on the side.
I know lol. And the mufflers look like 13/14 gt500 mufflers put on the rear of an s550. Who's to say that car doesn't have a 5.2 cpc supercharged motor under the hood?