GS Caltex (지에스칼텍스) is an energy company that manufactures petroleum products, petrochemicals, lubricants, and polypropylene compounds. It operates through three segments: Petroleum Refining, Lubricants, and Petrochemicals. The Petroleum refining segment produces petroleum products and raw materials of petrochemicals. The Lubricants segment produces lubricants and base oils, which are raw materials for lubricants. The Petrochemicals segment produces olefin products and aromatic products through high-temperature decomposition or catalytic reaction processes and uses such products to produce synthetic rubber, synthetic fiber raw materials, synthetic detergents, and chemicals. GS Caltex is a joint venture between GS Energy Corporation and Chevron Corporation.