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What Does "High Octane" Mean?

Last updated 4 years ago

Many of today’s luxury cars require high-octane gasoline fuel, oftentimes just referred to as “premium” gasoline. But what exactly is high-octane gas, and what makes it premium? The octane rating of gasoline is an indication of how much the fuel can be compressed before it spontaneously ignites. When gasoline ignites because of compression rather than the spark from the spark plug, it causes engine knocking, which can damage an engine. Luxury cars oftentimes have high-compression engines that achieve better efficiency and performance than regular-compression engines. These high-compression engines should be fueled by high-octane gasoline. If fueled by regular 87-octane gas, the high-compression engine inside of a luxury car can become seriously damaged.

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