Octane rating

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A US gas station pump offering five different (R+M)/2 octane ratings

Octane rating or octane number is a standard measure of the performance of a motor or aviation fuel. The higher the octane number, the more compression the fuel can withstand before detonating. In broad terms, fuels with a higher octane rating are used in high-compression engines that generally have higher performance. In contrast, fuels with low octane numbers (but high cetane numbers) are ideal for diesel engines. Use of gasolines with low octane numbers may lead to the problem of engine knocking.

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• Related: Avgas, Cetane number

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Gasoline FAQ Gasoline FAQ www.faqs.org/faqs/autos/gasoline-faq/part1/ - Web

How Octane Works at HowStuffWorks.com How Octane Works at HowStuffWorks.com auto.howstuffworks.com/question90.htm - Web

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