Gasoline was discovered 160 years ago but given not much attention until the early 1890s when automobile inventors realized its value as a motor fuel.
Gasoline is a product of extracted crude oil which is then heated through fractional distillation. To increase the octane rating,  gasoline undergoes a series of processes to remove impurities.
The three main grades of gasoline:
1. Regular
2. Midgrade
3. Premium
Gasoline stations have different names for these grades according to their octane rating. Octane rating is an antiknock gasoline property that resists knocking or pinging during engine combustion.
Today, the top gasoline producers in the world are the United States, Russia, Iran, China, Qatar, and Canada.