Breaking

US Diesel Prices Hit Record as Iran War and Russian Refinery Strikes Tighten Supply

September 4, 2026 at 10:46 EDT

Finance

US retail diesel prices climbed to a record $5.85 a gallon in the United States on Friday, extending a fuel squeeze linked to the six-month war between the US and Iran. The increase is also being amplified by attacks on Russian refineries and Moscow’s diesel-export restrictions.

SEPTEMBER 4, 2026 · US ENERGY

Diesel reaches a US record

A six-month war with Iran, attacks on Russian refineries and export restrictions are tightening fuel supplies and raising costs beyond the pump.

US diesel average

$5.85

per gallon

Brent crude

$95+

per barrel

Food cost tied to fuel

15%-30%

of total cost

US diesel average · dollars per gallon

The pump price is up sharply from before the war

$3.76Before war

$5.85September 4

The latest average is above the previous wartime peak and the nominal June 2022 record of $5.816.

The squeeze reaches beyond the pump

Diesel powers freight, farms, heating and food distribution, so a supply shock can spread through household budgets with a delay.

Supply

Hormuz traffic and Russian refinery output remain critical.

Pass-through

Higher freight and food costs may appear after a lag.

What benefits

Tight fuel markets have lifted US refinery margins above $100 a barrel.

What hurts

Drivers, freight operators, farmers and shoppers face higher operating costs.

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