How Oil Shapes the Economy — From Global Markets to Your Grocery Bill

The price on the gas station sign changes almost every day. Most people notice it — and most people don't fully understand why it moves. It's one of the few prices in everyday life that updates in near-real time, displayed publicly on a sign you drive past multiple times a week.

According to the U.S. Bureau of Labor Statistics, gasoline prices are so much more volatile than other components of the Consumer Price Index that, even though gasoline makes up less than 6% of the CPI, it is often the main source of monthly price movements in the all-items index.

That visibility makes gasoline prices feel like a barometer for the economy — and in many ways, they are. But the number at the pump is the end of a very long chain. Understanding where it starts makes the daily fluctuations significantly more legible.

What Oil Actually Is — and Why It's Everywhere

When people talk about "oil prices" on the news, they're usually referring to crude oil — the raw, unrefined substance extracted from underground reservoirs. Crude oil isn't useful on its own. It becomes useful after it's processed at a refinery, where it gets separated into dozens of distinct products with very different applications.

The most familiar is gasoline. But crude oil also yields diesel fuel, jet fuel, heating oil, liquefied petroleum gas, and a wide range of petrochemicals that serve as the raw material for plastics, synthetic fabrics, fertilizers, pharmaceuticals, asphalt, adhesives, and hundreds of other products that show up in daily life in ways most people never think about.

This is why oil has such an outsized influence on the economy. When oil prices rise, the cost of making, packaging, and shipping nearly everything goes up too. That cost increase moves through the supply chain and eventually arrives at the consumer.

Petroleum remained the largest source of primary energy consumption in the United States in 2024, totaling roughly 37% of total U.S. energy consumption, according to the EIA's Monthly Energy Review. Despite significant growth in renewables, no other energy source comes close to oil's share of the American economy's total energy diet.

Who Sets the Price of Oil?

Oil prices aren't set by any single government, company, or organization. They're determined by global commodity markets — specifically, futures exchanges where buyers and sellers trade contracts for oil delivery at a future date. The price that emerges from those trades reflects the market's collective assessment of supply, demand, and expectations about what's coming.

Two benchmarks dominate global oil pricing:

Brent Crude is the international standard, priced in London and based on North Sea oil. It's the reference price for about two-thirds of the world's oil supply.

West Texas Intermediate (WTI) is the U.S. benchmark, reflecting oil produced domestically and traded primarily in Cushing, Oklahoma. WTI and Brent prices typically move together, though they can diverge based on regional supply and logistics conditions.

Both are priced per barrel — a barrel containing 42 gallons. 

OPEC+ (the Organization of the Petroleum Exporting Countries and its allies) is the coalition of major oil-producing nations most closely watched for its influence on supply. When OPEC+ agrees to cut production, less oil enters the global market — and prices tend to rise. When it increases output, prices tend to fall. The group's decisions are among the most market-moving events in the commodity world.

U.S. domestic production is a significant counterbalance. The United States is the world's top crude oil-producing country, with production reaching a record 13.2 million barrels per day in 2024, according to the EIA. That level of domestic output gives the U.S. more insulation from global supply shocks than it had in previous decades — but it doesn't eliminate exposure, because oil is priced on global markets regardless of where it's produced.

Geopolitical events can move prices rapidly and unpredictably. Conflicts in major producing regions, sanctions on oil-exporting countries, or disruptions to critical shipping routes — like the Strait of Hormuz, through which a significant portion of global oil supply passes — can trigger sharp price swings in hours. Markets don't wait for disruptions to happen; they price in the probability that they might.

The U.S. also maintains a Strategic Petroleum Reserve (SPR) — a government-managed emergency stockpile of crude oil stored in underground salt caverns along the Gulf Coast. The SPR can be released during supply disruptions to ease price pressure. It's one of the few direct policy tools available to governments for short-term price management.

From Crude Oil to the Gas Station: How the Price Is Built

The number on the gas station sign isn't just the price of crude oil — it's the sum of several components stacked on top of each other. Understanding those components explains both the overall price level and why prices vary so much between states and regions.

Crude oil — roughly half the pump price

Crude oil typically accounts for about half of the retail price of gasoline, according to EIA data. When the price of Brent or WTI crude rises or falls significantly, that movement flows directly into the cost of producing gasoline — which is why pump prices often track crude oil prices with a short lag.

Refining costs

Crude oil must be processed into gasoline at a refinery. Refining adds cost — and that cost fluctuates based on refinery capacity, energy prices, and the complexity of the conversion process. The difference between the price of crude oil and the wholesale price of refined gasoline is called the crack spread — a measure of refining profitability. When crack spreads widen, refiners capture more margin and consumers may see higher prices even if crude hasn't moved much.

Distribution and marketing

Getting gasoline from refineries to the retail stations where consumers fill up involves pipelines, tanker trucks, storage terminals, and the operating costs of the stations themselves. Each step adds a margin to the final price.

Taxes

Federal and state taxes are included in every gallon purchased. The federal gasoline tax is 18.4 cents per gallon — a fixed amount that hasn't changed since 1993. State taxes vary significantly: California charges some of the highest combined rates in the country, while states like Texas and Florida charge considerably less. Local taxes in some jurisdictions add another layer.

Why gas prices matter beyond the tank

The most direct impact of gas prices is obvious: it costs more to fill up. But the ripple effects extend well beyond the gas station.

Transportation costs move through the economy

When fuel costs rise for trucking companies, airlines, and shipping logistics providers, those costs get passed along — eventually appearing in the price of groceries, goods, and services. As the Bureau of Labor Statistics notes, higher gasoline prices are likely to eventually have an impact on other prices as transportation costs increase — and that visible, frequent price signal creates a perception of broader inflation even when other CPI components aren't moving as sharply.

This is part of why energy prices are often treated as a leading indicator of inflation trends. A sustained increase in oil prices tends to broaden into other categories over weeks and months. A sustained decrease can have the opposite effect — providing relief that eventually shows up across the consumer price index.

The household budget impact is real — and uneven

Research from the Brookings Institution found that in 2024, households in the lowest-earning income quintile who had access to a car spent 10.3% of all pre-tax income on gasoline. The second-lowest quintile spent 5.2%. Higher-income households spend a significantly smaller share of their income at the pump — meaning gas price increases hit lower-income households proportionally harder.

That disparity is compounded by car dependency. Over 91% of U.S. households have access to a private vehicle — one of the highest rates in the world. Among U.S. workers in 2024, 78% used a private vehicle to commute, with another 13% working from home. Unlike in many other countries where public transit provides a meaningful alternative, the structure of most American cities and suburbs leaves households with limited flexibility to simply drive less when prices spike.

What makes prices go up — or down

Understanding the factors that drive gasoline prices up or down makes the news more legible — and the fluctuations less surprising.

Global demand is one of the most fundamental drivers. When the world economy grows, industries produce more, goods move more, and people travel more — all of which requires oil. When economic growth slows, demand softens and prices tend to follow.

Seasonal patterns are consistent and predictable. Gasoline prices typically rise in spring and peak in summer, driven by higher driving demand and the seasonal switch to summer-blend formulations — a cleaner-burning but more expensive type of gasoline that U.S. refineries are required to produce in warmer months. Prices often ease in fall and winter as demand drops and the cheaper winter blend returns.

Refinery disruptions can push prices up even when crude oil is plentiful. If a major refinery goes offline unexpectedly — due to a hurricane, a fire, or equipment failure — local fuel supply tightens and prices rise. This is particularly relevant along the Gulf Coast, where a large share of U.S. refining capacity is concentrated.

Geopolitical events are among the most unpredictable drivers. A conflict in a major producing region, sanctions on a significant exporter, or a disruption to a critical shipping chokepoint can send prices sharply higher within days — regardless of what underlying supply and demand fundamentals say.

Fleet fuel economy is a slower-moving but meaningful factor. As the U.S. vehicle fleet becomes more fuel-efficient over time — and as electric vehicles represent a growing share of miles driven — the same amount of travel requires less gasoline overall. This acts as a long-term brake on demand growth.

The Number at the Sign

The gas station sign is one of the most democratically visible price signals in the American economy — seen by nearly everyone, multiple times a week, regardless of income or background. It's also one of the most misunderstood.

The number reflects crude oil markets operating on the other side of the world, OPEC production decisions, refinery margins, a federal tax that hasn't changed in three decades, and state tax policies that vary enormously. It moves for reasons that have nothing to do with anything happening locally — and yet it lands very locally, in the household budget, in the cost of groceries, and in the broader perception of whether prices are going up or down.

Understanding that chain doesn't change the number on the sign. But it does make it easier to read — and to understand what it's actually telling you about the economy you're living in.