Wow is all I can say to so many of these responses.. Ignorance unfortunately.. and I don't say that in a mean way. I hauled gasoline, jet fuel, and aviation fuel in Austin, Tx and Dallas/Ft Worth for 7 years. In Austin there is ONE loading facility.. all gas for Shell, Chevron, Texaco, Mobil, Exxon.. all the major brands and all the independent brands come out of the same tanks. The only difference being the additives (Techron etc.) that are squirted into the fill lines during loading. DFW is served by 2 pipelins.. Koch and Explorer.. there are different loading facilities but the base gasoline is refined in Houston and piped to DFW..again you get either a Koch or Explorer base Gasoline with the only difference being the additive package that is injected at loading. What do I do?..I buy the cheapest gas available then about every 4th fill up hit a Chevron or other major brand and let their additives do a little cleaning. Moral of the story.. the base gasoline is the same across most brands regardless of where you live so making a big hoopla about brand x or y being better gas is not a good idea..If you have an additive preference.. cool, no problem. If you ever get bad gasoline in your car it is usually a malfunction with the station's equipment or filtration.. not the gas itself. Peace.