Imagine waking up tomorrow and all crude oil simply vanished. No petrol stations, no aircraft, no lorries, no large container ships. But also none of the vast range of plastics, chemical products, lubricants and countless other items we rarely associate with oil in daily life. The world wouldn't just become a little less mobile — the entire global economy would need to reorganise itself.
That's precisely what makes crude oil so fascinating. It's one of the most important commodities of modern civilisation — and, at the same time, one of the most closely watched markets in the world. Oil is particularly instructive here: behind the oil price lies a story of supply, demand, geopolitics, inflation, technology and human behaviour.
What actually is crude oil?
Before it's refined, oil is a complex mixture of various hydrocarbons. Refineries turn it into petrol, diesel, kerosene, heating oil, LPG, lubricants, bitumen and various petrochemical feedstocks, among other things.
Oil is therefore not just an energy source — it's also a vital raw material for the chemical industry. Plastics, paints, solvents and countless other products are based on petrochemical feedstocks. When we talk about oil, then, we're not just talking about the car outside the front door — we're talking about a large share of industrial infrastructure.
The barrel: the oil market's famous unit
One number keeps coming up around oil: the barrel, equal to roughly 159 litres. If you read "oil costs $80 a barrel", that doesn't mean a petrol station charges $80 for 159 litres of petrol — that would be a remarkably cheap fill-up. A barrel describes crude oil before it's refined, transported, taxed and sold. A great deal of additional cost sits between the crude price and the pump price.
Brent and WTI: why are there several oil prices?
Two terms come up constantly in oil news:
The two aren't identical: differences in quality, origin, transport and market structure affect their prices. It is worth remembering that "the oil price" isn't always a single number.
The domino effect of a high oil price
When the oil price rises sharply, filling up gets more expensive first — then a chain reaction begins:
Transport companies
Higher fuel costs make shipping and haulage more expensive.
Manufacturers
Higher production and transport costs can push up product prices.
Airlines
Higher kerosene costs can make air travel more expensive.
Businesses generally
Higher energy costs can squeeze profit margins.
Eventually, part of that effect reaches the consumer — which is why oil can be an important driver of inflation.
What happens when oil prices fall?
Now flip the story: drivers pay less, transport companies save money, airlines get some relief. For oil producers, however, a lower oil price means less revenue per barrel — and if the price falls sharply enough, projects can suddenly become uneconomical. An expensive offshore oil field, for example, can look far less attractive at very low prices than at high ones.
That's because not every barrel costs the same to produce: some deposits are easily accessible, others sit deep under the sea or require costly technical processes. That's exactly why different producers respond very differently to falling prices.
Saudi Arabia, the US, and the major producers
Geography plays an enormous role in oil: some countries hold vast reserves, others have particularly efficient production industries, and still others depend heavily on imports. One of the most important organisations is OPEC — the Organization of the Petroleum Exporting Countries. Together with other producers in the OPEC+ group, production levels can play a major role in the global oil market: when large producers change output, it can affect global supply and, with it, prices.
What makes oil geopolitical
If a large share of global oil supply sits in a region with political tensions, mere fears of reduced supply can move the price — even before a single barrel actually goes missing. Markets don't just trade the present; they trade expectations.
One particularly important example is the Strait of Hormuz, connecting the Persian Gulf with the Gulf of Oman — a large share of the world's traded oil passes through this region. Geopolitical tensions around this trade route can therefore carry enormous weight for the oil market. It illustrates something fundamental: with commodities, what matters isn't just how much exists — it's also whether it can reach the buyer safely.
The US and the shale oil revolution
One of the most significant shifts in the modern oil market was the rise of US shale oil production: new extraction techniques made it economical to unlock huge volumes of oil and gas from deposits that were previously harder to access. This changed the United States' position in the global energy market and shows something important — supply isn't static. Technology can suddenly change how much oil can be economically produced.
What does the energy transition mean for oil?
The simple answer would be "oil consumption falls" — reality is more complicated. Electric vehicles can reduce demand for petrol and diesel, and renewables can displace fossil power generation. At the same time, the world's population keeps growing and many economies keep developing, and oil isn't used solely as a fuel — the petrochemical industry remains a significant source of demand.
In its "Oil 2025" outlook, the International Energy Agency expects global oil demand to keep growing through the end of the decade, albeit considerably more slowly than in previous decades. The world could therefore become less dependent on oil as an energy source without abandoning oil as a raw material any time soon.
Peak demand or peak supply?
You'll often hear the term "peak oil" — broadly, the point at which demand or production reaches its highest level. It's worth looking closely, though, since the two don't necessarily happen at the same time:
Crude oil forms over geological timescales, yet we consume it within a handful of generations. Still, that doesn't automatically mean the price has to rise every year — what matters is how much can be produced economically, and how much people and businesses actually want to buy. A commodity can be physically abundant and still economically scarce — or physically finite and still remain sufficiently available for a very long time.
How the Oil Price Affects Operating Economics
Exploration and production companies, refiners, pipeline operators and integrated energy groups respond differently to oil-price movements. Their economics depend on the business model, cost base, production profile, offtake arrangements, regulation and debt.
A simplified example shows the operating leverage: if a producer sells oil at $80 a barrel with costs of $50, the operating margin is $30. If the oil price rises to $100 while other factors remain unchanged, the margin increases to $50. The effect also works in reverse. Price assumptions, production costs and sensitivity analysis are therefore central when assessing an operation.
Price Assumptions Need to Be Robust
Crude-oil prices can move sharply in response to economic conditions, supply changes, geopolitical events and currency effects. A project valuation should therefore use several transparent scenarios and show how each would affect liquidity, covenants and business continuity.
The oil price and recessions
A strong global economy needs a lot of energy; a weak one often needs less. A falling oil price can therefore be a positive signal — energy is getting cheaper — or a warning sign that the global economy is weakening. The question always has to be: why is the oil price falling?
Say oil drops from $100 to $70:
The same price drop can therefore tell an entirely different story. The price alone is never the whole story.
The key factors at a glance
The more useful question is not "will oil rise?" but "what factors could push oil up or down?" — for example:
- How much oil is being produced, and how much does the world need?
- What do current inventory levels look like?
- Are there risks to major producers or transport routes?
- Is new technology changing production or consumption?
- Is the global economy growing, or going through a weak spell?
- Are governments changing taxes, production quotas or energy policy?
The more of these puzzle pieces you understand, the better you can read the oil market.
Conclusion: why crude oil is so much more than petrol
Crude oil is energy. But it's also chemistry, transport, industry, geopolitics, inflation, technology — and a global financial market. That is exactly what makes oil so instructive: this single commodity lets you observe so many economic forces at once. A rising oil price can benefit producers and burden consumers; a falling one can relieve consumers and pressure producers. A conflict can move the price; a new technology can reshape it for the long term.
The oil price is therefore never just a number — it's the outcome of a global interplay between supply, demand, technology, politics and expectations. Behind every litre at the pump lies a story that stretches from oilfields deep underground to financial markets around the globe.
For more on other commodity classes, see our article Industrial and Platinum Group Metals.
Related Insights
- Industrial and Platinum Group Metals — another central commodities class at a glance.
