South Korean companies established in 1977

South Korean machinery manufacturer

defunct container carrier company

Korean automotive company

S-Oil Corporation () is a petroleum and refinery company, headquartered in Seoul, South Korea. It was established in 1976 under its original name Iran-Korea petroleum company (). It produces petroleum, petrochemical, and lubricant products. The company was listed as a Fortune Global 500 company in 2009 (Rank 441).