Ignoring the plug for his stock advice at the end.. here's a guy who "made gasoline" for a living.. saying.. "you don't need to buy premium gasoline" as not only is it not better.. just need it to avoid knocking.. compression ratio.. it actually may have less btus.."

https://www.investingdaily.com/79643/two-ways-to-save-money-on-gasoline-costs/