Here's how to check the six essential fluids in your car. After fuel (unless you have a fancy EV), oil is your car's most ...

If the fluid level is at or near the minimum level ... you can take the extra step and test the fluid yourself using a brake test kit. Have the kit ready before opening the lid If you need ...

Use brake fluid test strips or a pen tester to measure brake fluid quality ... Here, I used an inexpensive DIY-level brake ...