since i'll more likely than not be moving in with the pops in a couple of months, not having bills is going to free up a dramatic amount of money in my budget, so naturally, in perfect car guy form, i'm going car shopping. currently lusting after an 02 ws6 i saw online today.

do ls1 powered vehicles generally come from the factory running on 87 or 93 octane? what kind of mileage are you guys seeing who are running around with tuned ecu's? and after browsing edmunds for a while, when the hell did v8's get so damn fuel efficient? christ, 19/29 mpg... i don't think my contour even gets that good of mileage...