I run premium in everything, even if it's a beater.
It nets better MPG's, it keeps the gas tank/fuel system/lines/injectors cleaner, it BURNS cleaner as well, most of the time netting better co2's out the back, and you most of the time, get better performance. How much? Probably not anything you'll see...but something is better than nothing.
Also, the few more bucks at fill up for a cleaner, better gas is always a plus in my book. I strive to find non-ethanol additive gas...sure it costs more, but that's where the real MPG's and such are at. No mixed pumps...so you don't get a gallon~ of what the person before you used, which is why I always drove out of the way in my old cars to fill up at the 0% Ethanol, separate pump, 93 @ the BP a few miles from my place.
To me, it's worth it. Keeps the car in better condition...not to mention the overall lack of carbon build up over time that you would get with crappy low octane gas.
The Racekar - SOLD!
2007 Cashmere Metallic Chevy Cobalt LT Sedan
2010 VR Cobalt 2LT Sedan
Debadged, ZZP Intake, Custom 2.5" Exhaust/Borla Pro XS, FE5 Bidnez with KSport Springs.
Previously dumped on BC Xtreme Low's...RIP LOWLYFE :(