The Octane number rating of a gasoline is an indication of how the gasoline will perform under various engine conditions. Two different ratings are included: Research Octane Number (RON) and Motor Octane Number (MON). Finished gasoline must meet certain Octane number speci? cations. Thus re? neries control this parameter during production and must certify that a gasoline meets speci? cation before it is released. In addition, the Octan

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