1. Function:
- Engine oil: Engine oil is primarily used to lubricate the moving parts of your car's engine. It reduces friction between metal surfaces, helps dissipate heat, and carries away contaminants and debris.
- Power steering fluid: Power steering fluid is used in vehicles with power steering systems. It transmits hydraulic pressure to the power steering components, allowing you to turn the steering wheel smoothly and effortlessly.
2. Composition:
- Engine oil: Engine oil is a blend of base oils (mineral, synthetic, or semi-synthetic) and various additives. These additives enhance the oil's properties and provide additional functions like reducing wear, preventing corrosion, and controlling sludge formation.
- Power steering fluid: Power steering fluid is typically a mineral-based or synthetic oil with specific additives to enhance its hydraulic and lubrication properties. It also contains anti-wear agents and corrosion inhibitors.
3. Viscosity:
- Engine oil: Engine oil comes in different viscosity grades, which indicate its thickness or flow resistance. The viscosity grade is determined by the SAE (Society of Automotive Engineers) and is represented by a number followed by W (for winter). For example, 5W-30 is an engine oil with a low viscosity at low temperatures and a higher viscosity at high temperatures.
- Power steering fluid: Power steering fluid typically has a lower viscosity compared to engine oil. This ensures good flow and responsiveness in the power steering system, even at low temperatures.
4. Color and Appearance:
- Engine oil: New engine oil is usually amber or light brown in color. As it ages and accumulates contaminants, it turns darker.
- Power steering fluid: Power steering fluid is typically clear or red/pink in color. Discoloration or cloudiness can indicate contamination or degradation of the fluid.
5. Maintenance:
- Engine oil: Regular engine oil changes are necessary to maintain the health of your engine. The frequency of oil changes depends on the vehicle's make, model, and operating conditions. Consult your vehicle's owner's manual for the recommended oil change intervals.
- Power steering fluid: Unlike engine oil, power steering fluid does not typically require frequent changes. However, it's important to check the fluid level periodically and ensure that it remains clean and free of contamination.
Remember, always refer to your vehicle's owner's manual for the specific type and quantity of oil and fluid required for your car. Mixing or using the wrong fluids can lead to performance issues or even damage to your vehicle's components.
