octane rating

What: "I just want to add that In some High mileage engines, excessive carbon builds up in the combustion chamber making it slightly smaller, thereby raising the compression ratio. This can slightly increase octane requirements. Basically, Octane rating is like a shoe size. Buy the right size. A bigger one wont hurt you, but it wont help you in any way."

Writer: FreedomLover

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Date: Oct 2 2013 1:10 PM

What: "Octane rating is like a heat rating, in that the fuel will resist igniting before it should, its a more controlled burn. Thats what pinging is, its the fuel igniting before the spark of the sparkplug ignites it. Just the heat from high compression can cause this, carbon glowing red or a maybe a sparkplug thats too hot and glowing red igniting the fuel before its supposed to be ignited, an airleak on the intake creating a lean condition and causing excess heat can also do it."

Writer: Stink

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Date: Oct 2 2013 1:12 PM

What: "Best way to look at fuel octane rating is like choosing a ladder to get over a particular wall. Too short a lader and you are stuffed. About right and you will manage OK, with a slightly higher ladder being a bit safer (ie, octane rating of a fuel degrades with age, hence one reason old petrol can cause issues). Go beyond that and you are not gaining anything except the expense of a longer ladder and making it more difficult for you."

Writer: Kickstart

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Date: Oct 2 2013 1:14 PM

What: "Comparing these 2 different fuels by their octane rating is like comparing your shit to a tv dinner based on how much corn they contain."

Writer: 4x4le

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Where: Reference Link Has Evaporated

Date: Oct 2 2013 1:15 PM