Thai Oil Public Company Limited is a Thailand-based company. The Company is engaged in integrated operations in oil refining and petrochemicals. Its segments include Oil refinery, Lube base oil refinery, Aromatics and LAB, Power generation, Solvent, Ethanol, Olefins, and Others. It produces a diverse range of products, including refined fuels, petrochemicals, and base lubricating oils. It produces Euro V standard gasoline which involves changes to oil product specifications, including a reduction in sulfur content from 50 parts per million (ppm) to a maximum of 10 ppm. It also produces diesel according to Euro 5 standards, which helps reduce emissions of sulfur oxides (SOx), carbon monoxide (CO), nitrogen oxides (NOx), and black smoke into the atmosphere. It manufactures hydrocarbon compounds containing at least six carbon atoms in their molecules, characterized by an aromatic ring structure including benzene, toluene, paraxylene, and mixed xylenes.