Higher octane gas can allow for improved engine efficiency, but actually making such a widespread change in the US looks rather tricky.
A page allegedly taken from a Ford training manual shows just how much power that the 2015 Ford Mustang's 2.3-liter EcoBoost engine loses when burning lower octane fuel. It appears to make around 275 horsepower and 300 pound-feet of torque – about 11 percent fewer ponies than when using higher-grade gasoline.
In the ongoing struggle between magazines and websites, it should be immediately clear to anyone where we stand. With websites like ours getting constantly updated as the news emerges, magazines are increasingly becoming an outdated relic for delivering automotive news to enthusiasts (like yourself, reading this post).