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An octane rating, or octane number, is a standard measure of a fuel's ability to withstand compression in an internal combustion engine without undergoing pre-ignition. The higher the octane number, the more compression the fuel can withstand before detonating.
Octane number, measure of the ability of a fuel to resist knocking when ignited in a mixture with air in the cylinder of an internal-combustion engine. The octane number is determined by comparing, under standard conditions, the knock intensity of the fuel with that of blends of two reference.
Octane number is also known as octane rating. Octane numbers are based on a scale on which isooctane is 100 (minimal knock) and heptane is 0 (bad knock). The higher the octane number, the more compression required for fuel ignition.
Learn what octane number is and how to measure it using a standard test engine. Octane number is the percentage of iso-octane in a mixture that matches the fuel in knock intensity.
Nov 17, 2022 · The octane number is actually the simple average of two different octane rating methods—motor octane rating (MOR) and research octane rating (RON)—that differ primarily in the specifics of the operating conditions. The higher an octane number, the more stable the fuel.
Octane number is a measure of a fuel's resistance to knock or to ignite prematurely. Learn how it is determined by different tests, such as MON, RON and PON, and how it varies for different chemical compounds and blends.
Sep 2, 2023 · Learn how octane and cetane numbers measure the resistance to knocking of gasoline and diesel fuels, and how they vary with different conditions and variables. Find out the truth behind fuel myths and the risks of mixing different fuels in your car.
