Kinda same subject. I live by a huge fuel depot, that's on the Intercoastal Waterway. The same ship delivers oil to Cheveron, Shell, BP, Citgo, and whatever else fuel company is right there on the same dock. I know they all got their own filtration techniques, and put their own additives and crap in there, but they can't be that much different. To me, gas is gas. The only difference I see is octane ratings and price. It all comes out of the pump, with a yellow tint, and is unleaded.