European ultra-low sulphur diesel markets faced a sharp supply squeeze in September 2026, with refinery maintenance, unexpected outages and Rhine shipping restrictions lifting prices and refining margins, according to Alkagesta Media. Its Alkagesta Market Insights assessment said shortages across Northwest Europe and the Mediterranean pushed several market measures towards historical highs, while refiners ran primary distillation units close to their technical limits.
The report put the Northwest European CIF diesel crack spread against Dated Brent at $86.15 a barrel on 8 September. Front-month ICE low sulphur gasoil futures reached $1,568 a tonne on 15 September. Strong margins attracted additional supplies from the Americas and Asia, including between 549,000 and 781,000 tonnes of Indian diesel and gasoil loaded during September for delivery to Europe. Chinese refiners also increased westbound cargo allocations. However, Alkagesta warned that US commercial distillate stocks approaching 20-year lows could constrain continued exports, while European buyers faced competition from Asian importers.
Southern European demand was reinforced by the mandatory seasonal switch to French winter-grade diesel during local hydrocracker maintenance. The report cited bids at Mediterranean ports including Koper, Venice, Lavera and Mersin at premiums of $25–$75 a tonne above ICE low sulphur gasoil. These requirements added pressure to a market already struggling with reduced regional processing availability.
Inland distribution was another major constraint. Alkagesta reported water depths of 15–20 centimetres at the Rhine’s Kaub chokepoint by 21 September, with barge freight from Amsterdam-Rotterdam-Antwerp to Basel exceeding €215 a tonne. It said barge movements to Upper Rhine destinations in Germany and Switzerland had stopped, placing additional demands on rail and pipeline networks. Switzerland released 30,000 cubic metres of strategic diesel stocks, according to the assessment.
Looking ahead, Alkagesta expects tight conditions to persist into the fourth quarter. It put Amsterdam-Rotterdam-Antwerp middle distillate inventories at 2.108 million tonnes, 25% below their five-year average. Further secondary-unit maintenance, including a hydrocracker outage at Portugal’s Sines refinery, could restrict diesel output despite high primary processing rates. The assessment also anticipates concentrated heating-oil buying in Germany and Switzerland as temperatures fall, while Rhine restrictions could continue until sustained rainfall. These are the company’s projections rather than assured outcomes.