Man can create 'synthetic' oil, we can also grow crops to make 'vegetable' oil.
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Petrol is somewhat man made. Oil is a natural resource but it must be refined in order to make gas or petrol from it.
Man-made is anything created by humans; artificial. Often distinguished from "natural."
1- high maintenance cost 2- oil leaking 3- high construction cost (tanks-gauges- man-hauls- piping)
Kevlar is a synthetic fiber with an extremely high tensile strength. It was created in 1971 by DuPont Chemical group.
Only synthetic oil is man-made.
Oil Barons was created in 1983.
Duke of Oil was created in 1986.
Marathon Oil was created in 1887.
Schaeffer Oil was created in 1839.
Skelly Oil was created in 1919.
Maersk Oil was created in 1962.
Irving Oil was created in 1924.
Enterprise Oil was created in 1983.
Burmah Oil was created in 1886.
Oil's Well was created in 1983.
Pet'r Oil was created in 1980.