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What happens when using octane higher than your car is rated?

When you use gasoline with an octane rating higher than what your vehicle requires, it will not significantly improve the engine's performance. Octane ratings measure a fuel's resistance to knocking or pinging, which can occur in high-performance engines when the fuel-air mixture ignites too early. Modern vehicles have knock sensors that adjust ignition timing to prevent knocking, making it unnecessary to use gasoline with a higher octane rating than recommended.
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