What is the main use of oil?

The primary use of oil is in transportation, where it serves as a crucial energy source for fueling vehicles such as cars, trucks, planes, and ships. Oil-derived products, like gasoline and diesel, power the majority of the world's transportation systems. The significance of oil in transportation stems from its high energy density, which allows vehicles to travel long distances efficiently. Other uses of oil include industrial applications and heating, but transportation remains the dominant sector relying on oil products for movement and logistics.