Road Angels

Hydraulic oil delivers power, lubricates components, dissipates heat, and carries away contaminants. To perform these functions, hydraulic oils contain specific additives to enhance their ability to stand up to the pressure, temperature extremes, and other operating conditions to which they have subjected.

The most common base stock for modern hydraulic fluid is mineral oil, which is referred to as a Group I base oil. Other types of base stock may be required for special purposes and may include fluids such as propylene glycol or silicone oils.

Removing your old fluid, cleaning the system, and replacing the fluid disposes of the harmful sediments and protects your power steering components from wear or damage. ... When to service the system: Every vehicle has a different mileage interval for inspecting your power steering system..