Is The World Pricing The Risk Of A US Diesel Export Ban?

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Soaring energy prices are also continuing to push US inflation up more broadly. Consumer prices in September jumped year-on-year by a higher-than-expected 3.7%, with gas prices responsible for more than half of the most recent monthly increase.

How did this happen? Before the conflict with Iran erupted in February 2026, key diesel exporters included Russia, Middle Eastern producers, the United States and China. Since then, those first two export sources have withered.

Russia, now in the fifth year of its war against Ukraine, banned diesel exports in July 2026 after Ukraine launched an effective air campaign that has knocked out more than half of Russia's oil refinery capacity and destroyed many diesel storage-tank farms. That retaliatory campaign has pushed Russia from being a top diesel exporter to importing refined oil products, including diesel.

Meanwhile, in the Middle East, crude oil prices surged following missile attacks against Iran at the end of February. The Strait of Hormuz, which was the transit route for more than one-fifth of the global crude oil and natural gas output, essentially shut down amid fears over Iran targeting commercial ships sailing through.

Since then, increased shipments through Saudi and Emirati pipelines and actions by the US Navy in the strait have helped restart petroleum flows. But the threat to Hormuz shipping remains real, as seen by recent strikes by Iranian forces on multiple tankers in early October.

These shocks have changed the economics of petroleum shipments in two ways. First, the price of transporting oil has more than quintupled, as tanker owners charge record fees to travel through the strait. Those fees, of course, bleed into the price that diesel buyers pay.

Second, in the strait, the content of tanker cargo has changed. Many ships are now loaded with crude oil, rather than diesel, after Iranian strikes on Gulf countries earlier this year knocked out a substantial share of the Middle Eastern refining capacity. Insofar as there isn't much additional refinery capacity elsewhere in the world, even these restored crude oil flows can't bring diesel prices down to prewar levels.

What an export ban would look like

The effects of removing Russian and Middle Eastern diesel from the market are being felt worldwide. One result is that US diesel exports to the rest of the world have surged due to heightened foreign demand for the product and the high prices it can fetch abroad. Those export flows have been accompanied by the diesel price spike at home.

That jump in domestic prices is what's driving discussions of a possible ban on US diesel exports, and it reflects a dynamic that my co-authors and I laid out in our study of commodity export restrictions and bans. While we focused on agricultural markets, our findings also apply to the current diesel crunch.

Governments of commodity-exporting countries typically balance the interests of commodity producers and exporters, who prefer high prices, against those of domestic consumers, who like lower prices. When consumers' wishes matter relatively more – for example, as elections approach – the likelihood of a ban rises.

American consumers never like high energy prices. Nowadays, after years of elevated inflation, they seem especially unhappy about them. Until the Iran war, Trump had been able to tout a substantial fall in petroleum product prices after he returned to office in January 2025. That's no longer the case.