Thai Oil Public Company Limited, together with its subsidiaries, engages in the oil refining, petrochemicals, lube base oil, and other businesses in Thailand and internationally. It operates through Oil Refinery, Lube Base Oil Refinery, Aromatics and LAB, Power Generation, Solvent, Ethanol, Olefins, and Others segments. The company produces gasoline, diesel/gas oil, jet fuel, kerosene, fuel oil, and liquefied petroleum gas; and petrochemical products, such as paraxylene, benzene, toluene, and mixed xylenes. It also produces and distributes lube base oil, bitumen/asphalt, and other by-products, as well as special products, such as treated distillate aromatics extract, and slack wax; and hydrocarbon and chemical solvents, and other chemicals. In addition, the company operates natural gas-fired combined-cycle co-generation power plants that generate and sell electricity, steam, and utilities to companies and industrial users, as well as invests in other power generating companies and related business. Further, it is involved in the production of ethanol; and manufacture and sale of linear alkyl benzene for use in the production of detergents and cleaning products; and provision of human resource management services. The company was founded in 1961 and is headquartered in Bangkok, Thailand.