👉 The chassis fluid, also known as chassis sealant or chassis grease, is a specialized lubricating and protective fluid used in automotive engines and power transmission systems to ensure optimal performance and longevity. It serves multiple critical functions: it seals the gaps between the engine components, preventing contaminants like dirt, water, and debris from entering the system, and it reduces friction between moving parts, enhancing efficiency and reducing wear. Additionally, chassis fluid helps dissipate heat and can provide a slight cushioning effect, contributing to the overall durability and reliability of the engine.