Diesel prices in the United States have climbed to an average of $6.53 per gallon, a roughly 77% increase from $3.69 a year ago, according to recent data. The spike has far outpaced the rise in regular unleaded gasoline, which averages around $4.50 per gallon, and is now rippling through the broader economy because diesel powers much of the nation's heavy-duty trucking, farming, shipping, and rail networks.
The surge is being felt most acutely in industries that depend on diesel to move goods and produce food. Farmers, who rely on diesel for tractors and other machinery, are warning that the cost increase is eating into already thin margins. Senator Chuck Grassley of Iowa recently wrote on X that «High diesel prices ARE KILLING FARMERS INCOME.» For businesses that operate on narrow profit margins, the sustained price hike could prove devastating, and those higher costs are likely to be passed on to consumers in the form of more expensive groceries, retail goods, and services.
Several factors have combined to push diesel prices to record levels. The price of crude oil, the primary input for diesel, has risen this year due in part to bottlenecks in the Strait of Hormuz linked to the war in Iran. Diesel is a petroleum byproduct: on average, a 42-gallon barrel of crude oil yields 11 to 12 gallons of diesel, according to the U.S. Energy Information Administration. But crude prices alone do not tell the full story. Refining capacity has also been reduced by lower refining activity in parts of the Middle East and Russia, and by damage to refineries and infrastructure from military operations in those regions. Ukrainian President Volodymyr Zelenskyy recently said his country has destroyed 45% of Russia's refinery capacity. Diesel exports from the Middle East to Europe are at a six-year low, and diesel inventories and stockpiles in the U.S. have fallen significantly since the start of the war in Iran, leaving less fuel on hand and further straining supply.
With supplies tight and demand steady, analysts see little chance of a quick decline in diesel prices. In the near term, most goods and services are likely to remain elevated or rise further. Policymakers in Washington are searching for remedies. President Trump has voiced support for a temporary ban on diesel exports, saying «I've said let's not send out the diesel. We make a lot of diesel. I've called for it.» Congressman Tim Burchett of Tennessee, a Republican, has introduced legislation that would ban diesel exports through early next year. The idea has gained traction among farm-state Republicans who argue that keeping domestically produced diesel at home would ease prices for American consumers.
But energy analysts caution that an export ban would backfire. They note that the root cause of the price spike is higher crude costs and reduced refining capacity, not a lack of domestic supply relative to global markets. A ban might temporarily lower prices in some geographic pockets, such as the U.S. Gulf Coast where most diesel is produced, but it would quickly create a domestic glut, unwind much of the U.S. oil and refining industry, and cause gasoline prices to soar further. It would also deprive global markets of U.S. diesel supplies they have come to depend on, especially since the war in Iran triggered a worldwide energy crisis. As one analyst put it, «the cure would be far worse than the disease.»
For now, consumers should brace for higher costs across the board. Diesel-powered trucks deliver unleaded gasoline to retail stations, so the price at the pump for regular cars is also under pressure. From the gas station to the grocery store, the diesel spike is set to keep inflation elevated until either refining capacity recovers or global conflicts ease — neither of which appears imminent.