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Good points. They did it the lazy way. They need to burn at least 1.5 tankful's to purge the lower octane and produce more accurate results. Hopefully they or someone else will do a test using stricter testing procedures.

Horsepower gains from octane increases depend on engine sensitivity and diminishing returns. A jump from 87 to 91 octane (4 points) may yield 20 hp, but a smaller jump from 91 to 93 octane (2 points) might only add 5–8 hp. Gains aren’t linear, as engines often reach a tuning limit with higher...

I can confidently say that 99% of trucks coming into Maine are equipped with 4WD and are heavily optioned, depending on the location. Once you get north of Bangor, most trucks are SR5 trims; however, as you move south toward Boston, you'll see more premium packages and PIOs (Port Installed...