Maybe—that sounds reasonable, though again, I am not a petrochemist.

Let's be careful, though, not to conflate "more refined" and "higher octane"—that is an idea hinted-at in trying to get motorists to buy more expensive premium gasoline even though they get no benefit from it. There was a big marketing campaign on that basis by…Amoco in the mid-late '90s, I think it was. Print, radio, and TV ads about their water-clear premium gasoline (sooooo much cleaner and nicer than those icky old regular old normal old boring old dingy old yellow-brownish gasolines, don'tchyaknow!). They installed special nozzles on the premium pumps, with a sight glass containing a spinner ball so you could see the water-clear gasoline flowing through, and get a warm fuzzy feeling about buying extra-good stuff for your car to blot out the cold prickly feeling of money leaving your wallet without any actual benefit. They made that gasoline water-clear by an extra refining step. Was there any benefit to the user? None that I ever saw, heard of, or read about. Eventually the campaign was discontinued.

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Too many people who were born on third base actually believe they've hit a triple.