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I do think the article makes a good suggestion to try a few brands to see if there's a noticeable change - something I'm guilty of never doing.
Frank

I am not going to get into flame propagation as this can start a debate that can go on forever. Fuel octane may vary from day to day at any refinery. They are only required to meet the minimum for that octane. Add to the equation that at least in my area, where there are many refineries, the oil companyÆs will buy fuel from each other when production is shut down for repairs, maintenance etc. I have personally witnessed this many times. So if you are going to try different gasolines, you have no way of knowing that you will receive the same blend and octane consistently. The bottom line is that one pound of regular gasoline can deliver 20,460 BTUs of heat energy while High-octane gasoline actually has less heat energy potential, only 18,250 BTUs per pound. Choose what works for you.
Conner

Over the hill but still climbing.
88 Montero 2.6L auto, manual hubs, cooling fan conversion gps,recurved distributor,LSD Diff.