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Octane 95/92, Ok to mix? Quality of Petrol ? Ok to use additives? Know them all MRJ
Octane number: what is it?
Octane rating or octane number is a measure of the resistance of gasoline and other fuels to detonation (engine knocking) in spark-ignition internal combustion engines. High-performance engines typically have higher compression ratios and are therefore more prone to detonation, so they require higher octane rating fuel so, higher octane rating means higher knocking resistance tendency.
How do we measure it?
The octane number of a fuel is measured in a test engine against a mixture of iso-octane and heptane. If a gasoline sample has the same antiknock quality as that of a mixture containing 90% isooctane and 10% heptane, then the octane number for that sample is defined as 90. Some hydrocarbons have higher anti-knocking capacity than iso-octane. Hence, octane number definition is extended to allow octane numbers higher than 100.
Depending on the measurement techniques, there are following different types of octane numbers defined,
Research Octane Number (RON); is most commonly used octane number and it is determined by burning the fuel in a test engine under controlled conditions and variable compression ratios. Then the results are compared with mixtures of iso-octane and heptane.
Motor Octane Number (MON); testing uses a similar test engine to that used in RON testing, but with a preheated fuel mixture, higher engine speed (900 RPM instead of 600 RPM used for RON), and variable ignition timing to further stress the fuel's knock resistance. MON is a better measure of how a fuel will actually behave when under a higher load than normal.
Depending on the composition of the fuel, the MON of a modern gasoline will be about 8 to 10 points lower than the RON, however there is no direct link between RON and MON.
Some times an average of RON and MON known as Anti Knock Index (AKI) is specified in some locations. This is also known as Road Octane Number (RdON) or Pump Octane Number (PON).
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**Correction: toyota CHR can work with regualr petrol sorry the inconvenience
00:00 Introduction
01:20 What is knocking
02:00 What is octane rating
03:10 95 or 92?
03:20 What is my Engine octane rating
04:35 if 92 pumped for 95 rated engine
05:03 How octane rating created
06:00 Chemistry behind Octane
06:45 Octane boosters
07:10 Ethanol % E10
08:25 Super diesel Cetane value
Octane 95/92, Ok to mix? Quality of Petrol ? Ok to use additives? Know them all MRJ
Wagon R : 92, www.suzuki.co.jp/car/accessor...
octane number, also called Antiknock Rating, 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 fuels: iso-octane, which resists knocking, and heptane, which knocks readily. The octane number is the percentage by volume of iso-octane in the iso-octane-heptane mixture that matches the fuel being tested in a standard test engine.
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