Yeah, for sure...my father worked for Sun Oil in Pennsylvania in the 60s; he was a chemical engineer, specialized in distillation. He probably could have made a creditable moonshine if he tried, but instead wasted his talents on fuels and petrochemicals. He used only Sunoco gas, and when I got a car, I did, too. Never needed the 260 grade; I used (I think) 220 or thereabouts in my Triumph TR4A.