What are the five oils and three fluids in a car?
2 Answers
In a car, the five oils and three fluids refer to gasoline, engine oil, transmission fluid, brake fluid, power steering fluid, and coolant, windshield washer fluid, and battery electrolyte. Their functions and filling locations are as follows: 1. Gasoline is the primary liquid in a car, serving as the fuel for the engine and the source of all power in the vehicle; 2. Engine oil is the working medium of the engine lubrication system, providing lubrication and protection for the engine; 3. Transmission fluid functions to lubricate and cool the transmission, and in automatic transmissions, it also serves as the working medium for the control system; 4. Brake fluid is the working medium that transmits braking pressure in the hydraulic braking system; 5. Power steering fluid is a medium oil added to the power steering system, playing a role in transmitting steering force and providing cushioning; 6. Coolant is the working medium of the engine cooling system, offering functions such as antifreeze, anti-boil, anti-corrosion, anti-scale, and lubrication of cooling system components; 7. Windshield washer fluid provides cleaning, antifreeze, anti-fog, anti-static, lubrication, and anti-corrosion effects; 8. Battery electrolyte, also known as battery fluid, is added to the battery to react with the battery plates for charging and discharging.
The five oils and three fluids are essential aspects of vehicle maintenance that must be monitored. Based on my years of driving experience, the five oils include: engine oil, which lubricates the engine to reduce wear; transmission oil, ensuring smooth gear shifts; differential oil, maintaining the drivetrain; brake fluid, critical for braking safety; and power steering fluid, which makes steering easier. As for the three fluids, there's coolant (also known as antifreeze), which prevents engine overheating and cylinder damage; windshield washer fluid, used to clean the front windshield and remove dirt; and battery fluid, though many newer cars now come with maintenance-free batteries that don't require topping up. None of these oils or fluids can be neglected—failing to check them regularly, such as having too little engine oil, can lead to engine damage, while insufficient brake fluid may cause accidents. I recommend having a mechanic thoroughly inspect all levels during every service to ensure they are properly maintained. For older vehicles, this routine is especially important, as it can extend the car's lifespan and reduce the risk of breakdowns.
