Polyisobutene (PIB) is a versatile component widely used in lubricants as a dispersant preventing deposit and sludge formation in engines. PIB is pivotal in preventing deposit and sludge formation in engines. It keeps solid particles and contaminants dispersed, preventing them from depositing on critical surfaces. Additionally, PIB often exhibits detergent properties, neutralizing acidic byproducts and it enhances oil stability. PIB ensures engine cleanliness and aids corrosion prevention. The efficacy of PIB is dependent upon its molecular weight and formulation for optimal performance.