Im thinking of buying either a new or used s197 GT soon havent decided if im buying new or used yet though? I have a few questions, it will be my daily driver so what kind of gas mileage are you guys getting mostly city driving? Also do the new 4.6l need premium or can they run on low or mid grade? I live in Illinois so the snow can get pretty bad, how do these do in light(few inches) and heavy snow(six inches or so) I will be driving about 30 miles round trip to work and back. Also how much did you guys pay for your 05+ GT if you dont mind me asking?