Fuel costs across the United States have been trending upward, nudging the national average toward its peak for the year and prompting uncertainty about the trajectory of further increases. AAA data showed the countrywide average price of unleaded fuel hovered around $4.47 per gallon as of Friday.

Figures show a rise of over 40 cents across the previous month, around 17 cents over the past seven days, and more than $1.25 compared with twelve months earlier. The prevailing average sits roughly nine cents beneath the 2026 peak of $4.56, recorded on May 21. The nationwide per-gallon peak of just over $5 was recorded in June 2022, a figure that has yet to be surpassed.

Energy analyst Ed Hirs told a television network that gasoline prices of $5 per gallon across the country are now plausible, with the potential for even higher costs in certain regions should localised fuel supply disruptions occur, adding that per-gallon prices of $6 or $7 are conceivable in areas affected by such shortages.

The situation has been attributed to a combination of lower petroleum supply volumes and strain on processing facilities, a number of which are undergoing scheduled seasonal maintenance. These pressures are unfolding against a backdrop of ongoing instability in worldwide energy markets, shaped by the conflict involving Iran and other hostilities disrupting oil output and processing capacity.

Crude prices retreated on Friday yet held above the $100-per-barrel threshold. Brent crude closed at approximately $104.87 per barrel, while West Texas Intermediate finished near $100.30.

Persistent instability across the Middle East — including constraints on crude oil transit through key waterways and strikes on Saudi Arabian energy facilities — has continued to exert pressure on global energy markets.

President Trump has on multiple occasions expressed the view that fuel costs will decrease once hostilities with Iran conclude. Energy analyst Hirs offered a contrasting assessment, noting that even an immediate cessation of conflict would leave oil production and refinery operations in the Middle East too disrupted to return to pre-conflict market conditions for at least twelve months.

A number of measures have been put in place by the administration to curb rising fuel costs. Trump approved the drawdown of 172 million barrels from the Strategic Petroleum Reserve, forming part of a broader 400-million-barrel coordinated release among International Energy Agency member nations. According to the Energy Department, the domestic release would require approximately 120 days for full delivery.

The White House also moved up the yearly switchover from summer-blend petrol to the less expensive winter-blend fuel. Under typical circumstances, tighter warm-weather fuel standards stay active through the middle of September. The Environmental Protection Agency granted an emergency exemption earlier this year, permitting the shift to begin on September 1 and bringing the summer-blend mandate to a close roughly two weeks ahead of schedule.

The agency stated that the decision was projected to bring hundreds of thousands of additional barrels of gasoline into domestic supply each day, with the aim of putting downward pressure on fuel costs. Hirs described the early transition as having produced only a limited impact, adding that the administration had largely exhausted its available options.

The impact now extends well beyond those purchasing fuel for their vehicles. The nationwide average price for diesel fuel climbed to an all-time high of approximately $6.45 per gallon on Friday, AAA data showed. The figure sits roughly one dollar above the previous month's level and has climbed more than $2.70 compared with the same period last year.

Fuel derived from petroleum distillation holds a central role in the broader economy, powering the heavy vehicles, agricultural equipment, and construction machinery that underpin the production and distribution of goods. On Friday, the U.S. Energy Information Administration attributed recent increases in diesel prices to constrained worldwide distillate fuel inventories — a category that encompasses diesel — alongside elevated crude oil costs.

Elevated freight and manufacturing expenses tend to pass through to retail prices across food and other consumer goods.

Scholars at Brown University have separately sought to measure how conflict-related energy price rises affect households more broadly. According to projections from Brown University's Climate Solutions Lab, a typical American household has paid roughly $837 more for gasoline and diesel fuel since hostilities with Iran commenced on February 28 than it would have paid had the conflict not occurred.

The calculation draws on an analytical framework that contrasts current petrol and diesel costs against a projected no-war baseline derived from pre-conflict pricing, historical price trends, household fuel consumption figures, and Census demographic data. By September 7, the running total cited by Brown had already crossed the $100 billion threshold across the country.

Petroleum prices shift on a daily basis, while fuel at the pump is also shaped by factors such as refinery production levels, stock volumes, distribution expenses, and local availability. The nationwide figure has been trending in the other direction.