7 Car Fluids Every Owner Should Check

Engine oil, coolant, brake fluid and more. Here are the fluids every car owner should know how to check, and what to look for.

RCJ Mobile Mechanics

10/12/20261 min read

black and gray car engine
black and gray car engine

You don't need to be a mechanic to keep an eye on your car's fluids. A quick check every couple of weeks can catch problems long before they leave you stranded.

1. Engine oil

Check with the engine off and the car on level ground, ideally after it's been sitting a few minutes. Pull the dipstick, wipe it, push it back in fully, then pull it out again. The oil should be between the two marks. Oil that's very dark, gritty, milky or smells burnt needs attention.

2. Coolant

Check the level in the overflow reservoir when the engine is cold. It should be between the MIN and MAX marks. Never open the radiator cap when the engine is hot.

3. Brake fluid

The reservoir is usually on the driver's side near the firewall. The level should be between the marks. A falling level can mean worn pads or a leak. Dark fluid means it's due for replacement.

4. Transmission fluid

Some cars have a dipstick, often checked with the engine running and warm; many newer cars don't, and need a mechanic to check it. Fluid should be clean and not smell burnt.

5. Power steering fluid

On cars with hydraulic power steering, there's a reservoir with level marks. Cars with electric power steering don't have this fluid.

6. Windscreen washer fluid

Easy to forget, but important in the rainy season and on dusty roads.

7. Battery

Not a fluid you top up on most modern batteries, but check the terminals for corrosion and make sure the battery is secure.

Watch for leaks

Look under the car where you usually park:

  • Brown or black: engine oil

  • Green, orange, pink or blue: coolant

  • Red or pink: transmission or power steering fluid

  • Clear and slightly oily: brake fluid (serious, get it checked)

  • Clear water: usually just AC condensation, which is normal

Need help with this? RCJ Mobile Mechanics comes to you in Portmore, Spanish Town, Kingston, St. Andrew and across St. Catherine. Call or WhatsApp (658) 207-6565 or book a mechanic online.