Indian Oil recently launched the country’s first high performance, XP100 fuel. What this means is that the fuel has an octane number of 100. This is just a chemical way of saying, that it has greater resistance against engine knock. It will enhance the driveability, longevity of the engine and keep the emissions in check. It is meant for high-end luxury cars, whose engines can make complete use of the properties of this fuel. To understand the need for this fuel, let us understand how an engine works?
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What is engine knock?
In petrol engines, a spark is used to burn the air-fuel mixture in the cylinder. The flame starts at the top of the engine and moves gradually downward, to burn the entire mixture in the cylinder. It is important to know here, that the spark is the cause of combustion.
Sometimes, because of various factors, there are mini explosions inside the cylinder, which can also cause the air-fuel mixture to burn…
