Gasoline
Motor gasoline for spark-ignition engines, with grades defined by octane, composition and climate.
Product Overview
Gasoline is a blend of refinery components formulated for spark-ignition engines. Its performance depends on octane quality, volatility and composition. Research Octane Number (RON) is a familiar grade identifier, but a complete product specification also covers seasonal and environmental characteristics.
Grades & Specification
EN 228 is a common European reference for unleaded motor gasoline. Other markets apply their own destination standards and grade definitions.
| Characteristic | Reference Basis | Product Relevance |
|---|---|---|
| Octane Quality | RON & MON | Research and Motor Octane Numbers describe resistance to knock. |
| Sulphur | Destination-grade limit | Sulphur content is expressed in mg/kg. |
| Vapour Pressure | Seasonal volatility class | The applicable climate and season determine the volatility range. |
| Distillation | Evaporation profile | Controls light, middle and heavy fractions of the fuel. |
| Oxygenates | Ethanol, ethers & total oxygen | Composition and blend limits depend on the relevant grade. |
| Hydrocarbon Composition | Benzene, aromatics & olefins | Specified composition limits form part of the finished grade. |
Reference parameters are shown for product information. The contracted specification defines the numerical limits and applicable standard.
More Than an Octane Number
Two products with the same RON can differ in volatility, oxygenate content and suitability for a destination market. A finished motor gasoline is described by its complete specification, including the seasonal grade.