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Petroleum oil is a mixture of liquid hydrocarbons (chemical compounds containing only hydrogen and carbon) plus various impurities such as sulfur. Unprocessed petroleum is usually called crude oil. Petroleum oils are thick, flammable, yellow-to-black mixtures of gaseous, liquid, and solid hydrocarbons that occurs naturally beneath the earth's surface, can be separated into fractions including natural gas, gasoline, naphtha, kerosene, fuel and lubricating oils, paraffin wax, and asphalt and is used as raw material for a wide variety of derivative products. There are a number of consumer uses for petroleum oils. These petroleum oils can be purchased retail at a variety of stores.
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