Gas prices did not creep higher this week. They made a sharp nationwide move that is now showing up in daily budgets, freight costs and the price of nearly everything that travels by truck.

The latest AAA national averages put regular gasoline at $4.367 per gallon Wednesday. That is nearly four cents higher than Tuesday, more than 14 cents higher than one week ago and about 30 cents above the level drivers saw a month ago.

Compared with this time last year, the average gallon of regular gas now costs roughly $1.18 more. A typical 15-gallon fill-up at the national average is now about $17.70 more expensive than it was in September 2025.

The bigger shock is diesel.

AAA’s national diesel average reached $6.310 per gallon Wednesday, the highest figure in the organization’s recorded series. Diesel has gained nearly 37 cents in one week, about 86 cents in one month and more than $2.60 from a year ago.

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California now has the highest statewide regular-gas average at just over $6.04 per gallon. Washington, Hawaii, Nevada, Oregon and Alaska are all above $5, while even the lowest-priced states are running close to the $4 threshold.

The price map shows the increase spreading far beyond the coasts. Every region is being pulled upward by the same surge in wholesale fuel costs, though taxes, refinery access and local fuel requirements still create large differences from state to state.

The scale of the move was captured Wednesday as the newest AAA figures circulated:

The federal government’s weekly survey tells the same story.

Energy Information Administration data for the week of September 14 put regular gasoline at $4.319 nationally, up more than 16 cents in one week. The agency’s diesel measure climbed to $6.285, an increase of nearly 32 cents.

Those weekly readings lag AAA’s daily update, which helps explain why the newest numbers are even higher.

The regional EIA figures also show how widely the increase has spread. Regular gasoline averaged $4.191 on the East Coast, $4.091 in the Midwest, $3.852 along the Gulf Coast and $4.438 in the Rocky Mountain region for the latest reporting week.

None of those regions escaped the weekly increase. The data point to a broad national repricing rather than an isolated refinery outage or a temporary spike in one city.

There may be more pain still working its way through the system.

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One warning focused on the lag between wholesale fuel costs and the numbers posted on station signs. That lag means the full increase may not yet be visible to drivers, particularly in the Great Lakes and Rocky Mountain states.

The timing makes the surge even more unusual.

Gas prices normally begin easing after Labor Day as summer driving demand fades and stations transition to less expensive winter-grade fuel. Instead, the national average is climbing during a period when motorists usually get relief.

AAA said in its September 10 report that volatility around the Strait of Hormuz had pushed crude oil back above $100 per barrel for the first time since July. The report also noted that gasoline demand had declined while domestic supply increased, underscoring how heavily the crude market and geopolitical disruptions are driving the latest increase.

Demand fell from 8.92 million barrels per day to 8.55 million, while domestic gasoline inventories rose from 205.7 million barrels to 206.9 million. Under calmer market conditions, those figures would normally ease pressure at the pump.

The strain is not limited to one shipping lane.

The EIA’s September Short-Term Energy Outlook says global supplies remain constrained by renewed pressure on Iranian oil exports and by disruptions affecting Saudi Arabia’s Red Sea route, an important alternative to the Strait of Hormuz.

Recent strikes on Russian refineries and fuel infrastructure have added another layer of pressure to already tight diesel markets.

The EIA expects shipping flows to adjust, but its outlook says the constrained Red Sea channel will limit Saudi supply in the near term. It also points to renewed sanctions on Iranian oil interests and a continuing blockade that keeps normal Persian Gulf volumes from reaching the market.

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That matters because diesel depends on a narrower and more fragile global supply chain than gasoline. A disruption at a refinery or export route can move wholesale diesel prices quickly, and the effect then reaches trucking fleets, farms and construction companies.

ABC News reported Tuesday that attacks by Iranian allies were choking off additional oil supply while some retailers were rationing motor oil. President Trump continued to insist that the crisis would pass:

President Trump has acknowledged that relief may take time.

The Associated Press reported last week that the president does not expect oil prices to fall before the midterm elections. He predicted a decline afterward and said his administration could eventually push gasoline below $2 per gallon.

The comments marked a blunt acknowledgment that the current squeeze may last for weeks rather than days. They came as the Iran conflict continued to disrupt a route that handled roughly one-fifth of global oil shipments before the fighting.

Trump has also pressed Ukraine to halt attacks on Russian diesel infrastructure, arguing that the strikes are worsening a global fuel shortage. Moscow restricted diesel exports earlier this summer, further tightening a market that was already short of supply.

The administration is betting partly on new supply.

A September 2 White House release said the Venezuela oil agreement would give the United States access to additional low-cost barrels. The White House said at-cost oil could begin reaching the market by the end of 2026, with more meaningful production moving to the United States next year.

The administration says the arrangement covers 17 fields and gives the United States guaranteed low-cost access through a private Venezuelan oil operator. That company is currently producing about 250,000 barrels per day, according to the White House.

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Officials say the agreement could eventually add substantial supply, support American refineries and reduce fuel costs. The key word is eventually: the release says material production is expected next year, leaving the current market dependent on today’s constrained global flows.

That timeline offers little immediate comfort to drivers filling up this week.

And diesel’s impact travels far beyond the pump.

Trucks move groceries, retail goods, construction materials and farm products across the country. When diesel rises this quickly, carriers eventually have to absorb the cost or pass it along through fuel surcharges.

Either way, the pressure can reach consumers through higher prices.

The latest jump is therefore more than an unpleasant number on a roadside sign. It is an inflation warning arriving just as Americans would normally expect fuel costs to begin cooling.

This is a Guest Post from our friends over at WLTReport. View the original article here.

 

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