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- San Antonio, Texas
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- '15 CX-5 Miata AWD
Testing what though? If you google the topic, most of these questions come down to "will higher octane fuel give more horsepower ".. which is really a misguided question to begin with, because that's *generally* not the point of having higher octane fuel* basically comes down to a fundamental lack of knowledge of spark timing and how increasing engine speed affects it. They rarely talk about pinging or knocking; and why would they most people reading these articles likely have zero car knowledge. It's more convenient to earn ad/tv revenue, have another magazine article etc off that common misconception than actually inform people. Funny how these stories/shows never show/address the effects of putting lower octane fuel in a vehicle (guaranteed misfiring at higher RPMS at the least)... according to these articles, nothing would happen or you would just lose horsepower. Our engine is 13:1.. if you've ever driven it in any significant heat it's very easy to feel the effect of high DA, high IAT and high load on the performance.
But then again, the average joe who isn't really paying attention to performance or rarely get's the RPMS up probably wouldn't notice (which also begs the question would they even care about any performance increase).
This aaa article https://newsroom.aaa.com/2017/12/dont-fueled-premium-not-always-worth-price/ it seems to be more about price vs benefit (which is subjective, since their tests show positive gains with premium in accordance with their topic)
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