Why does oil smell?

Oil has a distinct smell due to the presence of volatile organic compounds (VOCs) and other chemical constituents that are released into the air. These compounds can include hydrocarbons and sulfur compounds, which contribute to the characteristic odor. Additionally, the refining process of crude oil can impact its smell, with different types of oil having unique scents based on their composition. Factors like temperature and exposure to air can also enhance or alter the smell of oil.