Which type of fluid is most commonly used in power steering systems?

Power steering systems primarily rely on hydraulic fluid due to its essential properties that facilitate the transfer of force in hydraulic systems. Hydraulic fluid is specifically designed to transmit power while allowing for efficient movement and control within the system. It needs to withstand a range of temperatures and maintain performance under pressure, which hydraulic fluids are optimized for.

Furthermore, hydraulic fluids are formulated with additives that help prevent wear and corrosion, ensuring the longevity of the components in the power steering system. This fluid also remains stable under various operating conditions, which is critical for maintaining consistent steering performance.

While other fluids might share some characteristics and could potentially be utilized in specific instances, they generally do not possess the same performance attributes or the protective qualities required for effective operation in power steering systems.