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Industry Oil and Gas
Founded 1977
Headquarters Seoul, South Korea
Key people
Nasser Al-Mahasher (CEO)
Revenue Increase 28.8 billion USD (2011)
Website http://www.s-oil.com
Hangul 에쓰오일
Revised Romanization Esseu Oil
McCune–Reischauer Essŭ Oil

S-Oil Corporation (hangul:에쓰오일) is a petroleum and refinery company, headquartered in Seoul, Korea. It was established in 1976 by old name SsangYong Refinery (hangul:쌍용정유). It produces petroleum, petrochemical, and lubricant products, as well as polysilicon products through its investment in Hankook Silicon. The company is one of the most profitable energy companies in Korea. The company was listed as a Fortune Global 500 company in 2009. (Rank 441). In the same year, the company was also awarded as "The Downstream Business of the Year" at the Platts Global Energy Awards. S-Oil's Onsan Refinery in Ulsan boasts a capacity of 580,000 barrels per day (BPD), along with a world-class Bunker-C Cracking Center(BCC), a Xylene Center, a Para-xylene plant with the world’s highest production capacity for a single facility. Its competitors in Korea include SK Energy, GS Caltex, and Hyundai Oilbank.

Corporate governance[edit]

As of 2012, the CEO and Representative Director is Nasser Al-Mahasher.


As of October 2008, Aramco Overseas Company (AOC), an affiliate of Saudi Aramco, owns 34.1% of S-Oil and Hanjin Energy owns 27.4%[citation needed]


  • S-Gasoline, S-Diesel
  • SSU Lubricant
  • S-Oil Bonus Card
  • Ultra-S (Group III Lube Base oil)
  • Para-xylene
  • Propylene


See also[edit]

External links[edit]