Im actually a petroleum engineer for Chevron and all of the top brand gases with a cleaning additive is basically the same. Chevron loves to claim that they are the best but doesnt everybody. One other t hing, There are 18 differant blends of gasoline in the united states, so a boat in california wont be running on the same gas as a boat in texas. Lastly, just because your buying chevron gas doesnt mean its from chevron, It could have been refined anywhere, it has just had thier additives added to it after the refining process. The mom and pop stores just have the same gas without the additives. So your not gonna go wrong with any gas I dont believe. I say just stick with what you like and believe in.