South Korean petroleum and refining company S-Oil on Wednesday (22 July) said it has started supplying B30 very low sulphur fuel oil (VLSFO), as the company seeks to support shipping’s decarbonisation efforts and growing demand for lower-carbon bunker fuels. The company said its B30 VLSFO contains 30% sustainable biofuel blended with conventional VLSFO and can be used without requiring modifications to existing vessels, enabling shipowners to comply more readily with emissions regulations from the International Maritime Organization (IMO) and the European Union (EU). S-Oil said it has established an integrated operating system in the Ulsan region covering the entire value chain, from feedstock procurement and blending to supply. The system combines VLSFO produced at its Onsan refinery with biofuel production facilities and storage infrastructure in the Ulsan region, allowing the entire process to be carried out within a single logistics hub. According to the company, the integrated supply chain reduces transportation requirements during production while improving supply efficiency and reliability. S-Oil also highlighted Ulsan Port as a strategic location for marine biofuel supply, noting the port has strong demand for bio-bunker fuels, particularly from car carriers, enabling prompt and stable deliveries to key customers. An S-Oil official stated: “In the bio-marine fuel market, not only product quality but also securing a stable supply of raw materials and an efficient supply system are important competitive advantages. “Based on our existing bunkering business capabilities and the excellent supply infrastructure in the Onsan area, we plan to supply stable and competitive low-carbon fuel.”   Photo credit: S-Oil Published: 23 July, 2026