AP Oil International Limited (SGX:5AU) is a Singapore-based investment holding company engaged in the manufacture and sale of lubricating oils, fluids, and specialty chemicals for industrial, automotive, and marine applications. The company operates through two primary segments, Manufacturing and Trading; the Manufacturing segment produces a wide range of lubricants including automotive lubricants such as gasoline and diesel engine oils, motorcycle engine oils, automatic and manual transmission fluids, gear oils, chassis oils, brake and clutch fluids; industrial lubricants; marine lubricants; greases; and specialty lubricants and fluids marketed under the AP Oil and SINO brands, while also providing oil blending services and equipment rental. Its Trading segment deals in base oils, additives, and specialty chemicals. Founded in 1975 as Huan Chew Oil Trading Pte Ltd and headquartered at 18 Pioneer Sector 1, Jurong, Singapore, with additional facilities including three lubricant blending plants—two wholly-owned in Singapore and one joint venture in Vietnam—and operations across Southeast Asia (Indonesia, Malaysia, Thailand, Myanmar, Cambodia, Philippines), the Middle East, East Asia (China, Taiwan, Hong Kong, Japan), the Indian subcontinent (Bangladesh, Nepal), and other regions such as Fiji. Recent developments include the divestment of Systematic Laundry & Uniform Services Pte Ltd in December 2024; proposed acquisition of 60% of Heptalink Chemicals Pte Ltd in December 2024; acquisition of the remaining 50% of Axel Oil Pte Ltd in April 2024; a proposed joint venture with Hup Soon Global Corporation Limited announced in March 2024; incorporation of a new subsidiary in China in 2024; and revenue growth to S$54.72 million in 2024, up 18.4% year-over-year.