Lubricants & Fluids maintain proper vehicle operation by reducing friction, dissipating heat, and transmitting force within mechanical and hydraulic systems. This category encompasses engine oils, transmission fluids, brake fluids, power steering fluids, coolants, and greases used throughout the powertrain, chassis, and accessory systems. Formulations vary widely based on viscosity, synthetic/mineral base stocks, and additive packages to meet specific OEM specifications and performance requirements. Key technical features include API/SAE grades, fluid compatibility, and protection against corrosion, oxidation, and thermal breakdown. Proper fluid levels and periodic replacement are critical for component longevity and system efficiency.