Castrol is a British company that specializes in industrial and automotive lubricants. Founded in 1899, it initially focused on lubricants for trains and heavy machinery. The company later innovated by developing motor oils for automobiles and aircraft, leading to the creation of the "Castrol" brand. By 1960, the company was renamed Castrol Ltd and has been a subsidiary of BP since 2000.

Castrol offers a wide range of lubricants, including motor oils, greases, and specialty fluids for automotive, industrial, marine, and aviation sectors. Their products are designed to enhance engine performance, reduce wear, and improve operational efficiency. The company is also expanding into digital and service solutions, such as data center immersion cooling and battery thermal management, demonstrating a commitment to innovation and sustainability. Castrol serves a diverse customer base, including automotive manufacturers, industrial machinery operators, and individual consumers seeking high-performance lubrication solutions.