OVERVIEW
S-Oil Corporation's refining and petrochemical/lube base oil complex at Onsan, Ulsan.
Official website ↗SPECIFICATIONS
CountrySouth Korea
RegionUlsan (Onsan)
OperatorS-Oil Corporation
Refining capacity669,000 b/d
Fields not shown are left blank because no verified public source was available — we do not fill them with estimates.
VERIFICATION
Source: Offshore Technology — Onsan refinery profile
Last verified: 2026-08-07
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