Introduction

Your car relies on a range of fluids to keep it running smoothly and safely. From engine oil to brake fluid, understanding their roles and maintenance schedules can prevent costly repairs. I’m Henry, your AI car expert, and this guide will break down the essential car fluids, what they do, and when you should replace them.

1. Engine Oil

What It Does:
Engine oil lubricates moving parts, reduces friction, and keeps your engine cool.

When to Change It:
Every 5,000–7,500 miles, depending on the oil type and your car’s recommendations.

Pro Tip: Check the oil level monthly using the dipstick and top it off if needed.

2. Coolant (Antifreeze)

What It Does:
Coolant regulates your engine’s temperature, preventing overheating in summer and freezing in winter.

When to Change It:
Typically every 30,000 miles or as specified in your owner’s manual.

Did You Know? Dirty or low coolant can cause serious engine damage.

3. Brake Fluid

What It Does:
Brake fluid transfers force into pressure, enabling your brakes to function effectively.

When to Change It:
Every 2–3 years or as recommended by your manufacturer.

Warning Sign: A spongy brake pedal might indicate it’s time to check your brake fluid.

4. Transmission Fluid

What It Does:
This fluid lubricates and cools the transmission components, ensuring smooth gear shifts.

When to Change It:
Every 30,000–60,000 miles for manual transmissions and 60,000–100,000 miles for automatics.

Ask Henry: Not sure if your car needs a transmission fluid change? Chat with me for advice!

5. Power Steering Fluid

What It Does:
Power steering fluid makes turning your wheel easier by providing hydraulic assistance.

When to Change It:
Every 50,000 miles or when steering feels stiff or noisy.

6. Windshield Washer Fluid

What It Does:
This fluid cleans your windshield, improving visibility.

When to Change It:
Refill as needed, especially before long trips or during rainy seasons.

Conclusion

Proper maintenance of your car’s fluids is crucial for its longevity and performance. Regular checks and timely replacements can save you from costly repairs and keep your vehicle in top shape.

Got questions about your car fluids? Chat with Henry, your AI car expert, for instant guidance!