As orders for marine gasoil (MGO) pick up in the Mediterranean because of new sulphur emission limits, the region has faced sudden supply shortfalls. Strength in wider distillate markets could reduce stocks even further.
The International Maritime Organisation's (IMO) new sulphur limits in the Mediterranean have significantly increased MGO demand since being implemented on 1 May. An eastern Mediterranean trader said before the region became an emissions control area (ECA) he had been asking local refineries for deliveries of 5,000-10,000t per month, but now it's around 30,000t. ECA rules cap sulphur limits for vessels transiting the sea at 0.1pc, down from the previous limit of 0.5pc. Consequently, many vessels have switched from bunkering very-low sulphur fuel oil (VLSFO), with a standardised sulphur level of 0.5pc, to bunkering MGO, a 0.1pc sulphur marine fuel.
Against sudden increases in demand, supply levels have failed to keep up, and MGO refining differentials have gained robust support as a result. Barges of MGO loading in northwest Europe have strengthened their price premium to front-month Ice Brent crude after hitting their narrowest 2025 premium in mid-March of $15/bl. Differentials widened to $33/bl by 19 June, a 16-month high, partly because Mediterranean marine fuels suppliers have not been receiving sufficient supply from refineries across Europe. These plants could be reconfiguring desired product yields in response to fresh demand fundamentals. The latest Eurostat data shows that in April Malta — a key Mediterranean bunkering hub — received 77,000t of gasoil and diesel oil, its highest imports since August 2020, probably in readiness for the ECA. Price spreads for middle distillates between northwest Europe and the Mediterranean also point towards a supply imbalance within the continent. This week, fob west Mediterranean French-specification heating oil, which can be used as a blending component for MGO production, was $14/t higher than the same product loading in northwest Europe, its widest spread since January 2023.
Overall product supply cuts in the rest of Europe are also likely to support prices for marine gasoil in the continent. ExxonMobil announced last week that units in its low-sulphur diesel facility will soon come online at its 270,000 b/d Fawley refinery in the coming days. The facility could boost low-sulphur diesel production by 40pc, to the detriment of higher sulphur distillate output. Ship tracking platform Vortexa estimates that roughly half of the MGO to have arrived in the Mediterranean since 2016 departed from Fawley. But this year none has arrived from the plant, compared with the 125,000t in the first half of 2024.
European distillate markets more broadly are also experiencing robust support because of increasingly tight regional supply. Prax, the owners of the UK's 107,500 b/d Lindsey refinery, entered insolvency proceedings in late June, with the future of the plant currently uncertain, potentially further cutting European distillate output. Backwardation spreads in the Ice gasoil futures market recently reached a 16-month high, indicating the market expects middle distillates to remain undersupplied in the near-term. This has meant lower-sulphur diesel, a road fuel, should be comparatively even more in demand from refineries than MGO. On 8 July, for example, 10ppm sulphur German diesel was pricing at more than $90/t above MGO, its strongest premium since November 2022. So, refiners will be looking to produce lower sulphur road fuels rather than MGO despite the current shortfall in the Mediterranean.

