When it comes to fuel efficiency and engine performance, Octane Number and Cetane Number are two crucial parameters. While the Octane Number applies to petrol (gasoline) , the Cetane Number is relevant for diesel fuels . Understanding these values helps in choosing the right fuel for vehicles, improving combustion efficiency, and reducing engine knocking. What is the Octane Number? The Octane Number (Octane Rating) measures a fuel's resistance to knocking (or pre-ignition) in a petrol engine. Knocking occurs when the air-fuel mixture ignites prematurely, causing inefficient combustion and potential engine damage. Types of Octane Ratings There are three common octane ratings used worldwide: Research Octane Number (RON) – Measured under low-speed, low-load conditions. Motor Octane Number (MON) – Measured under high-speed, high-load conditions. Anti-Knock Index (AKI) – The average of RON and MON, commonly used in the US. Octane Number Scale The Octane Number is...