What alkane is in petrol?

Petrol, or gasoline, primarily contains a mixture of alkanes, with octane (C8H18) being one of the most significant components. Octane is crucial for determining the fuel's performance, specifically its octane rating, which measures resistance to knocking during combustion. Other alkanes present in petrol include heptane (C7H16) and nonane (C9H20), contributing to the overall composition and properties of the fuel.