when i was rolling 205/50/15 (stock is 195/55/15) my max mpg was 42.
but 185 stock is soooo skinny!

i would do at least the 195....are bare minimum. and falkens are pretty loud to and for some reason they dont last that long either.
but then again i dont really listen to the tires, because i play my music really loud.

my k106 from hankooks lasted a beating and it was super cheap. federal tires are great aswell. please keep in mind im talking bang for the buck for both performance and price.