Impreza WRX STI F4-2.5L DOHC Turbo (2007)
Power Steering Fluid: Specifications
Power Steering Fluid Type
Use of one of the following fluids:
Genuine Subaru Automatic Transmission Fluid Type-HP
DEXRON III type Automatic Transmission Fluid.
When power steering fluid is being added, use only clean fluid,
and be careful not to allow any dirt into the tank. And never use
different brands together.