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octane number
(of gasoline) a designation of antiknock quality, numerically equal to the percentage of isooctane by volume in a mixture of isooctane and normal heptane that matches the given gasoline in antiknock characteristics.
Source: Dictionary.com

Octane rating


Octane rating or octane number is a standard measure of the performance of an engine or aviation fuel. The higher the octane number, the more compression ...

Octane Rating - Understanding Fuel Octane | Exxon and Mobil


Different vehicles need a different level of octane. Learn more about octane ratings and why some engines need high octane gas to run properly.

Paying a Premium for High Octane Gasoline? | Consumer Information


What are octane ratings? Octane ratings measure a gasoline's ability to resist engine knock — a rattling or pinging sound ...

Gasoline is most often produced by the fractional distillation of petroleum , also known as crude oil (it is also produced from coal and oil shale). In cracking, high molecular weight fractions and catalysts are heated to the point where the carbon-carbon bonds break. ... More »
By Anne Marie Helmenstine, Ph.D., About.com Guide

What is Octane number? definition and meaning


Definition of Octane number: Measure of the ignition quality of gas (gasoline or petrol). Higher this number, the less susceptible is the gas to 'knocking' ...

What does octane mean? - HowStuffWorks


During World War I, it was discovered that adding a chemical called tetraethyl lead (TEL) to gasoline significantly improved the gasoline's octane rating. See car ...

Octane ratings: Difference Engine: Who needs premium? | The ...


Sep 17, 2012 ... That is done these days primarily to boost the fuel's octane rating. A higher octane rating allows an engine to use a compression ratio of, say, ...

Octane Rating - Explained - YouTube


Sep 30, 2011 ... What's the difference between premium and regular fuel? What does that octane rating number represent? This video explains why cars with ...

FAQs — Questions, Answers, Octane, Gasoline Basics - Petro-Points


A gasoline's octane number is a measure of its ability to resist knocking as it burns in the combustion chamber of an engine. A spark from the spark plug starts  ...

octane rating | Define octane rating at Dictionary.com
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Popular Q&A
Q: What is octane rating of petrols?
A: Octane is an oil added to gasoline (petrol) to raise the ignition temperature of the gasoline. This is necessary in gasoline engines with high compression as th... Read More »
Source: wiki.answers.com
Q: What is the octane rating of petrol?
A: Octane rating is a measure of how resistant the fuel is to causing 'knocking' or pre-detonation in petrol(gasoline) engines. It is measured relative to a hydroc... Read More »
Source: wiki.answers.com
Q: What are the effects of octane rating.
A: Simple, If you engine requires 91 octane, and you put 87 in it, you will experience a degradation of engine performance, due to the lower octane having faster b... Read More »
Source: www.answers.com
Q: What is the octane rating of propane?
A: Propane has three carbon atoms chained together. ! Read More »
Source: www.chacha.com
Q: What is octane rating.
A: The octane rating of gasoline tells you how much the fuel can be compressed before it spontaneously Read More »
Source: www.chacha.com