Diesel prices in the United States have reached an all-time high of $5.85 per gallon, according to data released by AAA. This marks the highest average since June 2022, when costs peaked at $5.81 following Russia’s invasion of Ukraine.
The surge is largely attributed to compounding geopolitical tensions that have disrupted global fuel supplies. Conflicts involving Iran have severely impacted shipping routes through the Strait of Hormuz, while Ukrainian strikes on Russian refineries have reduced fuel exports from the region.
Patrick De Haan, a petroleum analyst at GasBuddy, emphasized the economic significance of the price hike. Because diesel powers the “three T’s” of the American economy—trains, tractors, and trucks—it is integral to the industrial supply chain.
On the eve of the war with Iran in late February, a gallon of diesel cost $3.76. The more than $2 increase per gallon is expected to trigger broader economic effects. De Haan noted that when diesel driving the supply chain becomes more expensive, those costs inevitably trickle down to consumers.
The impact is already being felt across multiple sectors. Approximately 90% of the nation’s 500,000 school buses run on diesel, and rising fuel costs are stretching back-to-school budgets for districts nationwide. Additionally, much of the farm equipment used in the U.S. relies on diesel, raising the risk of higher food prices.
Jaime Brito, head of Dow Jones Energy, highlighted another factor complicating the market: rising jet fuel prices. With jet fuel costs increasing since the outbreak of war, U.S. refineries shifted production toward jet fuel to capitalize on the price incentive, resulting in reduced diesel output.
Global supply constraints have further exacerbated the shortage. Some Asian refineries have limited their diesel exports, and Russia has curtailed its own diesel shipments while importing fuel from countries such as India, Kazakhstan, and Belarus due to refinery damage.
The price hike adds pressure to an economy already grappling with sustained inflation. The latest Consumer Price Index data released in August showed inflation at 3.4% over the past year. A recent analysis from the Federal Reserve Bank of New York indicates that energy price increases are disproportionately affecting lower-income households.
Experts warn that diesel prices may remain elevated for months due to seasonal demand. Historically, prices rise in the fall to meet the needs of agricultural equipment, 75% of which runs on diesel, according to the Engine Technology Forum. As winter approaches, demand for heating oil—which is chemically similar to diesel—typically increases, further driving up costs for both fuels.
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