Pibsi or PIBSI (polyisobutylene succinimide) is an additive used in lubricating oils, especially engine oils. Known as a detergent and dispersant additive, it is used to keep engine parts clean and prevent the formation of deposits and sludge.
Pibsi works by effectively dispersing and suspending contaminants and particles that may form during engine operation. It prevents these particles from settling and forming deposits on critical engine surfaces, including piston rings, valvetrain components and oil passages. By keeping these components clean and free of deposits, Pibsi helps maintain engine performance and efficiency.
In addition to its detergent and dispersant properties, Pibsi also acts as an anti-wear agent, providing additional protection to engine components against wear and friction. It forms a protective film on the metal surface, reducing friction and minimizing potential damage.
Overall, Pibsi is used in lubricants such as engine oil to effectively clean and protect engine components, prevent the formation of deposits and sludge, and improve the overall performance and life of the engine.