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Spend a moment to think about the biggest diesel importers in the world: Maguire

The U.S. and Israeli war on Iran has brought the crude oil price to the forefront of public attention. Most economies are powered by fuels and not oil. The sharp rise in diesel prices this year will likely cause the greatest economic damage.

This is particularly the case in fuel-importing countries, who generally lack their own refinery capacity and must therefore rely on the international markets to supply diesel, gasoline and jet fuel, among other refined products.

Fuel prices are rising faster than crude oil in some of the world's most important fuel trading hubs. This is a blow to consumers who have no choice but to pay for their fuel due to the lack of alternatives.

The most significant increase in jet fuel prices has been in the majority of major trading regions. This is partly because the Middle East played a large role in the marginal supply of the fuel before the Iran conflict reduced ship traffic in the Strait of Hormuz.

Diesel, or gasoil, is a close second and has a much deeper impact on everyday economic activities.

Diesel is the main energy source for trucking fleets and rail systems. It also powers agriculture, construction, and agricultural equipment.

The Iran War has caused a 50% increase in diesel prices in some markets. Importers will continue to face shortages of diesel until the conflict is resolved.

Top Buyers

Australia is the world's largest importer of diesel fuel, largely due to the closing of old refineries, and the unusually diesel-intensive economy of the agriculture, mining and trucking sectors.

Data from commodities intelligence company Kpler show that Australia will import around 25 million metric tonnes of diesel in 2025. This is equivalent to about 2.10 million tons per month.

Australia has imported around 2,19 million tonnes a month so far in 2026. This is mainly due to an increase in purchases in March to 2.52 million tons, which was a 18-month record. The conflict in Iran triggered a panic among importers.

Fuel traders will continue to closely monitor the import volumes as the full impact of the higher import costs in 2026 is felt throughout the economy.

Turkey, the second largest diesel importer in the world, has cut imports by 24% since 2026 as a result of rising prices.

S&P Global predicts that Turkey's energy inflation will average 29% in this year, due to its heavy dependence upon imported energy products.

Fuel inventories below normal due to lower imports may exacerbate the inflation problems in Turkey, but trucking, the backbone of the logistics system in Turkey, will continue to be imported over the next few months.

Even if the high prices in Turkey cause more domestic economic pain, it is likely that continued Turkish interest will support international diesel until there is a significant recovery of global diesel supplies.

Other key importers

Diesel is a fuel that has a high demand, and it's difficult to reduce the imports despite the rising prices.

However, some other large diesel importers managed to reduce their import volumes in 2026 as compared to last year.

Kpler data shows that 10 of the top 15 diesel importers by 2025 have cut their imports this year in comparison to the average monthly imports of 2025.

Brazil, France Egypt, United Kingdom, and South Africa, which were ranked third to seventh on the importer rankings in 2025, have all reduced their import volumes this year in comparison to the same month in 2025.

The total?purchases made by these five nations between January and April was 17.3 millions tons. This compares to 21 million tons in the same period of 2025.

The 3.6 million ton drop in collective purchases in recent months has "freed up" supplies for other importers and ensured that diesel price did not rise any further during peak periods of shortage.

Diesel is essential to each of these economies, so an increase in imports can be expected, especially during periods of low prices tied to fluctuations in crude oil?prices.

The global diesel market is likely to remain supported by end-user demand for the near future, despite the cautious approach of cost-conscious imported who were forced to reduce their order sizes because of sticker shock.

Spare a thought, at the end, for those countries who rely the most on diesel. They are bound to a fuel that they cannot replace easily, regardless of the price.

Diesel is used to power the trucks and machinery that transport food, the machines that grow it, and the generators which keep the lights on in the event of a failure of the grid.

These economies are forced to slow down or pay more when supplies become scarce and costs rise.

Diesel's stubborn necessity in a world obsessed with crude benchmarks leaves the biggest importers the most vulnerable and the least able escape the squeeze.

These are the opinions of the columnist, an author for.

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(source: Reuters)