European ultra-low sulphur diesel supply tightened sharply in September 2026 as refinery maintenance, unexpected outages and Rhine shipping restrictions pushed prices and refining margins higher, according to Alkagesta Newsroom. Its Market Insights report described spot prices, prompt differentials and crack spreads in Northwest Europe and the Mediterranean reaching multiyear or near-historic highs, with nearby supply commanding substantial premiums over later deliveries.
Alkagesta put the CIF Northwest Europe ULSD crack against Dated Brent at $86.15/barrel on 8 September, while front-month ICE low sulphur gasoil futures reached $1,568/tonne on 15 September. Refiners ran primary distillation units close to their technical limits to benefit from strong middle distillate margins, but regional production shortfalls encouraged buyers to seek additional cargoes from the Americas and Asia.
The report estimated that 549,000–781,000 tonnes of Indian diesel and gasoil loaded during September were destined for Europe, alongside increased westbound ULSD allocations from Chinese refiners. European buyers competed with Asian importers for those supplies. Meanwhile, US commercial distillate stocks approaching 20-year lows raised doubts over whether strong American export flows could be sustained. In Southern Europe, French winter-grade requirements and local hydrocracker maintenance supported bidding at Mediterranean ports at premiums of $25–$75/tonne over ICE low sulphur gasoil.
Inland distribution faced a separate squeeze. Alkagesta reported water depths of 15–20cm at the Rhine’s Kaub chokepoint by 21 September and Amsterdam-Rotterdam-Antwerp-to-Basel barge freight above €215/tonne. It said barge traffic to Upper Rhine destinations in Germany and Switzerland had stopped, increasing pressure on rail and pipelines. Switzerland released 30,000 cubic metres of strategic diesel stocks in response, according to the report.
Alkagesta expects tight conditions to extend into the fourth quarter, citing ARA middle distillate inventories of 2.108 million tonnes, 25% below the five-year average. Secondary-unit maintenance, including a hydrocracker outage at Portugal’s Sines refinery, is expected to constrain diesel output despite high primary-unit utilisation. Delayed heating oil purchases in Germany and Switzerland could concentrate demand as temperatures fall, while Rhine restrictions are expected to persist without sustained rain. The outlook reflects Alkagesta’s assessments and publicly available information; the company cautions that actual developments may differ from its projections.