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Message: <blockquote data-quote="saru-kun" data-source="post: 1167073" data-attributes="member: 1524">Octane rating of gasoline don't increase power.http://www.answers.com/topic/petrol<a href="http://en.wikipedia.org/wiki/Gasoline" target="_blank">http://en.wikipedia.org/wiki/Gasoline</a>The amount of power that can be produced from a fixed amount of fuel depends on the energy content inherent in the fuel itself and the efficiency of the engine that is running the said fuel.Remember that lil' science experiment back in sec school where you play with this setup:- a small jar of fuel is setup to heat a fixed volume of distilled water to its boiling point. The weight of the fuel before and after burning is recorded and the data is run through the formula Q = mco, where m is the differece in the mass of fuel before and after experiment, c being the specific heat capacity of water (4200 J kg-1 degC-1) and o, being the temperature change of water (boiling point - room temperature).Your result would be in the unit Joules.Pardon me for the chem tutorial. Just what I know ^^Lets hope I don't get shot down in all flaming glory.CheersEdit: a fuel with higher octane rating allows higher compression to be achieved without predetonation (?), thus the extra power...The question mark, I have heard that "predetonation", "ping", "knock" and "preignition" are different...or am I wrong?</blockquote>

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