O.K. Guys and girls, a Lil fuel info for ya. Non-Ethenol tips:Most stations get their fuel from the same terminals(in this area there is a Shell and Chevron, also a BP but they get their fuel pipelined from Shell) the only difference is the additive that gets injected into it as it is loaded. Gas and water don't mix, let it sit and they will seperate. Although bad gas does happen (rare but affects a region not a station)it is usually "bad tank" and "stale gas" issues that you see as bad performance. Stations that sell more gas usually have less issues with this. Use the most popular stations(no matter the brand) in your area and "bad gas" should be gone for you.
Ethenol is another matter, 10% (called E10)is the max you should run in any non-flex fuel engine(flex-fuel uses E85). Ethenol has a higher octane than even premium, But it takes almost 2 times the fuel to get the same A/F ratio. Ethenol will mix with water, and will get water into your fuel and make your car/bike run like crap. This is what makes tank maintance much more of a factor with Ethenol. Use the same guidelines as Gas and the problems with E10 is reduced. Also try to use only below ground tanks with E10 due to condensation(water again). Ethenol also does damage to rubber lines over time, and DO NOT leave it in a rubber lined fuelcell in storage
No need to get into all the rumors about no differences in octane, fueling when the station is getting fuel delivered or the 1 hose "premium" debate. People belive what they belive. But if you learn the smells you'll know what your getting. Yep E10 has a different smell(think rubbing alcohol) than regular gas and premium smells different(stronger and kinda sweeter) than regular(sorry Mid-grade users it smells like regular

)
Now fill 'em up and lets ride.