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Originally Posted by OldBlevins
Interesting, though, for us Newbs. I was always under the impression higher octane gas was yielded more power. Now I know better.
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Higher octane gas doesn't yield more power, but it does allow you to develop more power by running more spark advance, more boost, higher compression, ect.
In a modern computerized engine that is designed and tuned to take advantage of high octane gas, you do develop more power automatically when using the correct, higher octane gas.
In an engine optimized to burn 87, you don't make or lose HP by using 93. You just pay more money.