What is petroleum made of?

Petroleum is made of hydrocarbons formed from ancient marine microorganisms subjected to heat and pressure over millions of years.

Is petroleum the same as gasoline?

No. Gasoline is a refined product made from crude oil.

Why is petroleum so important?

It fuels transportation, powers industries, and is used in thousands of everyday products.

Will the world run out of oil?

Eventually, yes, but the timeline depends on consumption, new discoveries, and the shift to renewable energy.

46 Petroleum Facts That Explain Our Most Powerful Resource

By James Israelsen, Associate Writer

Published March 23, 2026

Petroleum powers modern life, but most people have no idea how strange, ancient, and influential it really is. From prehistoric origins to global politics, these petroleum facts reveal why oil remains one of the most powerful resources on Earth.

What Petroleum Really Is
Petroleum exists in liquid (crude oil), gas (natural gas), and solid (bitumen) forms._[1]
The word petroleum comes from Latin: petra (“rock”) and oleum (“oil”): literally meaning “rock oil.”_[1]
Petroleum is a fossil fuel, formed from microscopic marine organisms buried and transformed over millions of years._[1]
Most petroleum deposits formed long before dinosaurs existed._[1]
Oil isn’t found in underground “lakes”; it’s trapped in tiny pores within rock formations._[1]
Ancient Uses of Oil
The Sumerians used natural bitumen for waterproofing boats and building roads over 4,000 years ago._[1][9]
Ancient Egyptians used petroleum-like substances in medicine and embalming._[1]
Bitumen was sometimes used as punishment in ancient Assyria, showing how widely available it was._[1]
Early Middle Eastern chemists developed primitive oil distillation techniques nearly 2,000 years ago._[1]
Ancient armies used oil in warfare, including early incendiary weapons._[1]

Drake was the first American to refine petroleum into kerosense

The Birth of the Modern Oil Industry
In 1859, Edwin Drake drilled the first successful commercial oil well in Pennsylvania._[1]
This discovery launched the modern global oil industry._[1]
Oil quickly replaced whale oil and became a dominant energy source due to its high energy density and transportability._[1]
Early refined petroleum was mainly used as kerosene for lamps._[1]
How Petroleum Works
Crude oil is refined into products like gasoline, diesel, jet fuel, and asphalt._[1]
Petroleum is also used to make plastics, synthetic fabrics, and chemicals._[1]
A standard barrel of oil holds 42 gallons, but refining produces about 45 gallons of usable products due to processing gain._[1]
Oil doesn’t have a single freezing point; scientists use a “pour point” to measure when it stops flowing._[1]
Global Oil Power
The world produces roughly 100 million barrels of oil per day._[1]

As much oil as the US produces, it isn't nearly enough

The United States, Saudi Arabia, and Russia are among the top oil producers._[1]
The Middle East holds a large share of known oil reserves, making it geopolitically critical._[1]
The U.S. is one of the largest producers, but also one of the largest consumers of oil._[6]
Countries with major oil reserves often wield significant global influence._[10]
Middle Eastern oil profits were used in the creation of both the Taliban and Al-Qaeda terrorist groups._[10]

Our cars run on eons-old remains

Petroleum in the United States
The U.S. produces about 15–20% of the world’s oil._[6]
Major oil-producing regions include Texas, Alaska, and North Dakota._[6]
The U.S. maintains a Strategic Petroleum Reserve, the largest emergency oil stockpile in the world._[6]
Surprising Everyday Uses
Petroleum is used in products like crayons, cosmetics, deodorant, and detergents._[6]
It’s also found in medical equipment, packaging, and electronics._[6]
Even eyeglasses and synthetic clothing often rely on petroleum-based materials._[2]
Disasters & Environmental Impact
The Deepwater Horizon spill (2010) is one of the largest accidental oil spills in history._[5]

It is estimated that the Deepwater Horizon spill killed over 80,000 birds, 25,000 marine mammals and untold numbers of fish

Saddam Hussein was responsible for the largest oil spill in history. In 1991, during the Persian Gulf War, he ordered the opening of oil valves on the Sea Island Pipeline, releasing oil in an attempt to slow the advance of the Unites States military._[5]
Oil spills can devastate marine ecosystems and wildlife populations._[2]
Burning petroleum releases carbon dioxide, a major driver of climate change._[2]

Petroleum is a mainstay of commercial manufacturing

Scientists estimate that burning all known reserves would release hundreds of billions of tons of carbon._[2]
How Oil Is Found & Extracted
Early oil drilling relied on guesswork; today, companies use seismic imaging technology._[2]
Oil can naturally rise to the surface due to intense underground pressure, sometimes creating dramatic “gushers.”_[2]
Offshore drilling allows access to oil deep beneath ocean floors._[2]
The Future of Petroleum
Petroleum takes millions of years to form, making it a nonrenewable resource._[7]
Even though Venezuela has the largest reserves of oil fields in the world, the country has undergone several gasoline shortages in recent years due to a combination of factors arising in relation to the socialist Venezuelan government’s management of oil._[3]
Estimates suggest global oil supplies could last 50–100 years, depending on usage and new discoveries._[8]
Renewable energy sources are expanding, but oil remains deeply embedded in global infrastructure._[8]
Oil in Culture & History
Movies featuring oil production as a major part of the plot include Armageddon, Mad Max 2: The Road Warrior, and There Will Be Blood, which is based on the fiction book Oil! by Upton Sinclair._[4]
Carlos Andres Perez, a past president of Venezuela and founding member of the modern oil industry, once said, “Oil is the devil’s excrement.”_[5]
It has been called “the world’s most important commodity.”_[1]
Many experts argue that a large portion of oil reserves must remain unused to limit climate change._[8]