The global diesel market is facing mounting supply pressure as the US-Iran conflict disrupts refined fuel shipments across the Persian Gulf. Although crude oil movements through the Strait of Hormuz have partially recovered, diesel exports have yet to rebound at the same pace, leaving international energy markets vulnerable to shortages and elevated prices.
Gulf diesel exports from Saudi Arabia, the United Arab Emirates, Kuwait, Bahrain and Oman reportedly declined from around 1.4 million barrels per day in 2025 to approximately 670,000 barrels per day in September 2026. That represents a fall of about 52%, highlighting the scale of disruption to the global refined fuel supply chain.
Why Is the Iran War Affecting Diesel Supply?
The Strait of Hormuz is a crucial route for Middle Eastern energy exports. Attacks on shipping and restrictions linked to the US-Iran conflict have disrupted tanker movements, making it harder for producers to deliver refined fuels to international buyers.
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The gradual recovery in crude oil transit has not translated into an equivalent improvement in diesel exports. Shipping companies continue to face security risks, higher insurance premiums and rising freight charges. These constraints matter because diesel is essential for freight transport, agriculture, construction and industrial activity. Reduced availability can increase fuel costs and put additional pressure on businesses and consumers.
Russia-Ukraine War Adds to Global Fuel Pressures
The Russia-Ukraine conflict is affecting diesel supplies through a different mechanism. Ukrainian drone strikes have damaged Russian refineries, while Western sanctions have forced changes in established energy trading routes.
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