The new product, known as B30 VLSFO, combines conventional very low-sulphur fuel oil with about 30 percent sustainable biofuel.
Because it can be used without any modification to a vessel's engines, the refiner said, it offers shipowners an immediate and practical way to meet tightening emissions rules imposed by the International Maritime Organization and the European Union.
The company produces VLSFO at its Onsan plant and links it to nearby biofuel production and storage facilities, a setup it said minimizes logistics and sharpens operational efficiency.
The Ulsan port draws heavy demand for biofuel-blended marine fuel, driven largely by car-carrier vessels, positioning the refiner to serve major customers quickly and reliably.
"In the biofuel-blended marine fuel market, competitiveness rests not only on product quality but on securing a stable feedstock supply and an efficient delivery system," a company official said.
"Building on our existing bunkering business and the strong supply infrastructure in the Onsan area, we plan to provide customers with stable and competitive low-carbon fuel."
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