Crude oil is an important source of:
These fuels are non-renewable - they are being used up faster than they are being formed.
A feedstock is a raw material used to provide reactants for an industrial reaction. A petrochemical is a substance made from crude oil using chemical reactions. For example, ethene is produced from crude oil. It is used as feedstock to make poly(ethene), a polymer.
Almost all consumer goods require crude oil as part of the manufacturing process but crude oil is a finite resource. It forms extremely slowly over millions of years and is being used much faster than it can be replaced. It is important to balance the short-term benefits from fuels and materials crude oil produces with the need to conserve supplies for the future.