Science Fair Project Encyclopedia
Oil is frequently used to refer to petroleum, the type of oil that is pumped up from the ground and currently serves as a major energy source and important part of the world economy. The term Foreign oil is used in the United States to refer to imported petroleum, a major point of concern since the 1973 energy crisis.
Types of oil
- Cooking oil
- Painting oil
- Petroleum (crude oil)
- Mineral oil
- Essential oil
- Motor oil
- Tramp oil is the unwanted oil that becomes mixed with cutting fluids.
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