Why Gas Prices Change — and Why Your Neighborhood Can Be Different

Gas prices have a way of feeling arbitrary. A station changes its sign overnight. A station a few miles away is cheaper. Another state can look like an entirely different fuel market.

But the retail price of gasoline is not one number set by one company. It is the end of a supply chain stretching from crude-oil markets to refineries, pipelines and terminals, tanker trucks, taxes and finally the economics of the individual station.

Start with the barrel

Crude oil is the basic feedstock from which refiners produce gasoline, so changes in crude prices eventually work their way toward the pump. But the relationship is not perfectly synchronized. Gasoline has its own wholesale market, refiners have their own costs and margins, and retail prices can take time to respond.

That distinction matters whenever someone tries to explain a pump-price move with a single headline about oil.

Refining can move independently

A refinery does more than simply pour crude oil into one end and gasoline out the other. Different crude oils, refinery configurations, seasonal fuel specifications, maintenance schedules and unexpected outages all influence the cost and availability of finished gasoline.

That is why gasoline can become more expensive even when crude oil alone does not explain the entire increase. EIA describes the difference between petroleum input costs and wholesale product prices as a refining margin or “crack spread.” When refining capacity is tight, that portion of the equation can become much more important.

Then gasoline has to reach you

Finished fuel moves through pipelines, terminals and trucks before reaching a neighborhood station. Transportation constraints, regional inventories and distance from supply can therefore create meaningful geographic differences.

Some regions also require special gasoline formulations. Those fuels may require additional processing or blending components, and regions with fewer supply connections can react more sharply when a refinery or transportation link is disrupted.

Taxes create another layer

The federal gasoline tax is 18.4 cents per gallon. EIA's January 2026 table puts average total state gasoline taxes and fees at 33.27 cents per gallon, before county or local taxes that may apply in some places.

That means two otherwise similar fuel markets can begin with different tax structures before local business conditions enter the picture.

Why two stations across town can disagree

Stations do not all have the same rent, payroll, traffic, supply contract, operating costs or competitive environment. One location may use aggressively priced gasoline to attract customers into a convenience store. Another may charge more because its location commands it.

So the cheapest station is not necessarily selling fundamentally different gasoline, and the expensive station is not necessarily making an enormous profit on every gallon. Retail strategy is only one layer in a much larger system.