What is EPSF oil?
2 Answers
EPSF is power steering fluid. Power steering fluid is a special liquid used in a car's power steering pump. Through hydraulic action, it can make the steering wheel very light, similar to automatic transmission fluid, brake fluid, and shock absorber fluid. Introduction to Power Steering: EPS stands for Electric-Power-Steering, which is an electric power steering system. The electric power steering system is the development direction of automotive steering systems. This system directly provides steering assistance through an electric power motor, eliminating the need for a power steering pump, hoses, hydraulic oil, drive belts, and pulleys mounted on the engine, saving energy and protecting the environment. Function of Power Steering Fluid: Power steering fluid can also be referred to as 'power steering oil' or 'steering gear oil,' used to transmit hydraulic pressure in the steering system. Power steering fluid has high viscosity, poor fluidity, a distinct odor, and is somewhat corrosive.
I've driven quite a few cars and noticed many people mistakenly refer to power steering fluid as EPSF, which is likely a typo. In fact, it's what we commonly call PSF – power steering fluid. This fluid is the core of hydraulic power steering systems, specifically designed to reduce steering wheel resistance. Its role is crucial: if the fluid level is low or leaking, the steering wheel becomes heavy and difficult to turn; topping it up immediately makes steering much easier. I remember my old car had this issue – when I checked the reservoir, the fluid had turned black, but after replacement, steering became smooth again. Maintenance is simple: open the hood, locate the small plastic reservoir labeled for steering fluid, and ensure the level stays between Min and Max marks. I recommend checking every 10,000 km using dedicated fluid matching OEM specifications – never mix with other fluids as it may damage the system. Don't underestimate its importance; neglecting this routine maintenance could lead to major repairs. It's a vital component.
