Two gas stations can sit only a few blocks apart and charge noticeably different prices for what appears to be the same gallon of gasoline. Travel across a state line, and the difference can become even larger. Behind those numbers displayed on roadside signs is a complicated combination of crude oil markets, refineries, transportation networks, taxes, environmental regulations and local competition.
For millions of Americans traveling over Labor Day weekend, one of the biggest expenses may come before they even reach their destination: filling the tank.
Gasoline prices are expected to top $4 per gallon nationally during the holiday weekend amid elevated fuel prices and continuing geopolitical pressures, according to Axios.
But a national average tells only part of the story.
A driver can leave one state, cross a border and encounter dramatically different prices. Sometimes, drivers do not even need to travel that far. Two stations in the same city — or occasionally on opposite sides of the same road — can sell gasoline at different prices.
So why isn’t a gallon of gas simply priced the same everywhere?
The answer begins long before gasoline reaches the pump.
The Price Starts With Crude Oil
Gasoline begins with crude oil, making global oil prices one of the most important influences on what Americans ultimately pay at the pump.
According to the U.S. Energy Information Administration, crude oil is generally the largest component of the retail price of gasoline.
That means events occurring thousands of miles from an American gas station can eventually influence the number displayed on its sign.
Wars, geopolitical tensions, production decisions by major oil-producing countries, hurricanes, changes in global demand and disruptions to shipping routes can all affect crude oil markets.
When crude oil becomes more expensive, refineries must pay more for the primary raw material used to manufacture gasoline.
Those higher costs can eventually work their way through the supply chain to drivers.
But crude oil is only the beginning.
Crude Oil Has to Become Gasoline
Drivers cannot simply pour crude oil into their vehicles.
Oil must first travel to a refinery, where it is processed into gasoline, diesel, jet fuel and numerous other petroleum products.
Operating a refinery costs money, and the amount of gasoline available from refineries can have a major effect on regional prices.
When a refinery undergoes scheduled maintenance, suffers an equipment failure or temporarily shuts down, the amount of gasoline available in that region may decrease.
If demand remains strong while supply falls, wholesale gasoline prices can rise.
The effect can be particularly noticeable in regions that depend heavily on a relatively small group of refineries.
Not All Gasoline in America Is Actually the Same
A gallon of regular gasoline in one part of the country is not necessarily chemically identical to a gallon sold somewhere else.
Different areas of the United States require different fuel formulations, often because of environmental and air-quality regulations.
Some regions use reformulated gasoline designed to reduce certain types of air pollution. Gasoline formulations can also change depending on the season.
These requirements can make fuel more expensive to manufacture, store and distribute.
California is one of the clearest examples.
The state requires a specialized gasoline formulation and has relatively limited connections to other major U.S. refining centers. That means gasoline produced elsewhere cannot always be quickly redirected into California when the state’s supply becomes tight.
The result is a fuel market that can behave differently from much of the rest of the country.
Then There Are Taxes
Every gallon of gasoline sold in the United States includes taxes.
The federal gasoline tax is the same nationwide, but state taxes and fees are not.
As of January 2026, the federal tax on gasoline was 18.4 cents per gallon, while total state gasoline taxes averaged more than 33 cents per gallon, according to the U.S. Energy Information Administration.
But that average hides significant differences among individual states.
Some states impose substantially higher gasoline taxes and fees than others. Local governments may also impose additional taxes.
That means two stations purchasing gasoline at similar wholesale prices could still charge different amounts simply because they operate on opposite sides of a state or local boundary.
Geography Matters More Than Drivers May Realize
Gasoline also has to physically reach the station.
After leaving a refinery, much of America’s gasoline travels through pipelines to storage and distribution terminals. It may then be blended with components such as ethanol before tanker trucks make the final delivery to individual stations.
Every stage costs money.
Stations located closer to refineries, major pipelines, ports and fuel terminals may have logistical advantages over areas where gasoline must travel greater distances.
The Energy Information Administration says transportation distance is one reason retail gasoline prices can differ among regions.
Geography can become especially important when something interrupts the normal transportation network.
A pipeline problem, hurricane, refinery shutdown or other disruption can suddenly make it more difficult to move gasoline into a particular market.
And gasoline cannot always be instantly rerouted from another part of the country.
Why Two Gas Stations Across the Street Can Have Different Prices
National oil markets, taxes and refineries explain why prices differ across the country.
But they do not completely explain something drivers see every day: two nearby stations charging different prices.
At that level, the economics become much more local.
Every gas station has its own operating costs.
One station may pay significantly more in rent. Another may have higher labor expenses. A station connected to a large retail chain may negotiate fuel purchases differently from an independent operator.
Stations also compete based on location and convenience.
A station immediately beside an interstate exit may be able to charge more because travelers value convenience and may not know where the next cheaper station is located.
Another station a mile away may lower its price to attract drivers willing to travel slightly farther.
Competition matters as well.
An area with numerous gas stations competing for the same customers may put downward pressure on prices. A station with little nearby competition has less incentive to undercut its price.
Gas Stations Don’t Necessarily Make Huge Profits From Gasoline
A high number displayed on a gas station sign does not necessarily mean the station owner is collecting the difference as profit.
Stations must purchase the fuel themselves.
They also have expenses including transportation, employees, electricity, property costs, equipment maintenance, insurance and payment-processing fees.
For many convenience stores, getting a driver onto the property can be nearly as important as selling the gasoline itself.
Once someone stops for fuel, that customer may walk inside and purchase coffee, drinks, snacks, lottery tickets or other products.
That helps explain why some stations aggressively compete on gasoline prices: cheaper fuel can serve as a way to bring customers onto the property.
Why Prices Can Change Overnight
Gasoline prices can also move surprisingly quickly.
Stations periodically receive new fuel deliveries, and the wholesale price of the next tanker load may be different from the previous one.
Oil markets can change daily.
Refinery conditions change.
Regional gasoline inventories rise and fall.
Demand changes.
And competing stations adjust their own prices.
A station owner watching nearby competitors may change the price displayed outside even before many drivers realize the broader market has moved.
That is why prices can sometimes rise rapidly across a city and then slowly decline later.
Summer Gasoline Can Be Different From Winter Gasoline
The time of year also matters.
Gasoline sold during warmer months generally must meet different volatility requirements than winter fuel.
Summer-grade gasoline is formulated to reduce evaporation during hot weather, helping limit air pollution.
Changing between seasonal gasoline formulations adds another layer of complexity to the nation’s fuel supply system.
At the same time, Americans typically drive more during the summer travel season, increasing demand just as refineries are producing more specialized summer fuel.
The transition back toward winter gasoline can change supply conditions again.
There Really Isn’t One American Gasoline Market
It is tempting to think of gasoline as one enormous national commodity: oil goes into refineries, gasoline comes out and every station sells essentially the same product.
In reality, America’s gasoline system functions more like a collection of interconnected regional markets.
Different regions have different refineries.
They use different pipelines and terminals.
Some require different gasoline formulations.
States impose different taxes.
Transportation distances vary.
And once gasoline finally reaches a community, individual retailers still compete with one another.
That is why a national average can never completely describe what any particular driver will pay.
The number glowing above a gas station may look simple — $3.89, $4.29 or $4.79 per gallon.
But behind those few digits is a supply chain stretching from global oil fields and financial markets to refineries, pipelines, governments, tanker trucks and finally the gas station on the corner.
