With the price of premium fuel out here on the left coast climbing to $2.35+ at Chevron, Shell, Exxon, etc, it's hard to pass by the Costco, Terrible Herbst, Rotten Robbie gas stations when their premium is 25 or 30 cents a gallon cheaper. I've yet to hear any arguments on the benefits of the name brand gas - Chevron, Shell, Exxon, etc. Are there any chemists or oil refinery people out there that can tell me why I shouldn't patronize the cheaper generic gas stations? Is there a difference in the gas? Doesn't it all come from the same refineries? Come on guys, let's open up this discussion.