Since most gasoline comes from one or two pipelines within an area, IMHO there's not a lot of difference in the lot. Georgraphy is probably more important than brand name. My assumption is that all use additives from one of the big four suppliers.
I have noticed one difference. There's an independent owner here who sells Citgo branded gas that's known for being pure crap. This criticism does not apply to 7-11's Citgo. Come to think of it, he used to run a couple of Amoco stations and that stuff was bad too. That's why I'd rather buy a large retailler's (like QT in the St. Louis market) gasoline--even if they don't have refining capacity-- than a small mom and pop operation, no matter the brand of gas.
[ October 10, 2003, 11:30 AM: Message edited by: csandste ]