Originally Posted by Steckers
Funny thing about various gas station "brands":
In actuality, all the gas trucks (76, Shell, Arco) fill up from the exact same refinery (locally speaking, not interstate). There was a study done a few years back that followed the gas trucks from various gas stations, and found that both the "cheap" and "expensive" gas comes from the exact same source, the local refinery. The only differences are the post-production additives (i.e. Techron, etc) that are designed to burn cleaner. So basically the need to spend "x" for "y" gas is purely marketing
Correct. My original question applied to the additives. Maybe there is so little additives that it makes no difference, but maybe some companies use more and some use less. Maybe the additives lower the octane? I have researched this and googled that and have found no studies or lab analyisis of different brands of fuel.