Best Way to Check & Top Up Car Fluids: A Simple DIY Guide

by | Jun 13, 2025 | DIY Do It Yourself, Garages Car Sheds, How to, Motoring, Motorsport | 0 comments

Keeping your car’s fluids in check is one of the simplest ways to keep it running smoothly and avoid costly repairs down the track. Whether you’re an old hand in the shed or just getting started with DIY car maintenance, knowing how to check and top up essential fluids is a must. So, grab a rag, pop the bonnet, and let’s get cracking!

Why Fluids Matter

Think of your car’s fluids like the lifeblood of your engine and key components. They keep things lubricated, prevent overheating, and ensure smooth operation. Neglect them, and you’re asking for trouble—overheating engines, grinding gears, and dodgy brakes aren’t fun for anyone.

Here’s what we’ll cover:

Let’s take a closer look at how to check and top up each one.

1. Engine Oil – Your Engine’s Best Mate

How to Check

  1. Make sure the engine is cold or has been off for at least 10 minutes.
  2. Locate the dipstick (usually with a bright handle, near the engine).
  3. Pull it out, wipe it clean, and stick it back in.
  4. Pull it out again and check the oil level against the markers.

Topping Up

  • If the oil is low, grab the right grade of oil for your car (check your manual if you’re unsure).
  • Slowly pour in small amounts, checking the dipstick in between.
  • Don’t overfill—it’s just as bad as having too little!

Shop for engine oils here.

2. Coolant – Prevents Overheating Disasters

How to Check

  1. Never open the radiator cap when the engine is hot—it can be dangerous!
  2. Locate the coolant reservoir (usually a clear plastic tank with ‘Min’ and ‘Max’ markers).
  3. If it’s below the minimum, you need a top-up.
Topping Up

  • Use the correct coolant type (mixing coolants can cause trouble).
  • Slowly pour into the reservoir until it reaches the ‘Max’ line.

Find coolants and additives to keep your engine safe.

3. Brake Fluid – Stops You in Your Tracks

How to Check

  1. Locate the brake fluid reservoir—it’s usually near the back of the engine bay.
  2. Check the level against the ‘Min’ and ‘Max’ markers.
  3. If it’s low, you might have a leak—get it checked!
Topping Up

  • Use only the recommended brake fluid for your car.
  • Pour slowly and avoid spills—it’s corrosive stuff.

Grab brake fluids for a safer ride.

4. Transmission Fluid – Smooth Shifting Ahead

How to Check

  • Some cars have a transmission dipstick, while others require a check through the transmission pan or filler plug.
  • Run the engine in park or neutral and check levels like you would with engine oil.
Topping Up

  • Use only the specified transmission fluid for your car.
  • Pour in small amounts, checking the dipstick or filler plug regularly.

Browse transmission fluids.

5. Power Steering Fluid – Effortless Turning

How to Check

  • Locate the power steering fluid reservoir (usually labeled).
  • Check the level against the markers.
Topping Up

  • Use the correct type of power steering fluid.
  • Pour in gradually—too much can cause foaming and poor performance.

Check out power steering fluids.

6. Windshield Washer Fluid – A Clear View Ahead

How to Check

  • Locate the washer fluid reservoir (usually has a windshield symbol on the cap).
  • If it’s low, top it up—it’s as simple as that.
Topping Up

  • Use a premixed washer fluid or mix your own with water and a bit of concentrated washer fluid.

Shop for washer fluids to keep your windscreen spotless.

Windshield Washer Fluid

Tips for DIY Fluid Checks

  • Check fluids regularly – Once a month is a good habit.
  • Park on a level surface – This gives accurate readings.
  • Look for leaks – If fluid levels drop quickly, you might have a problem.
  • Always use the right fluid – Your car manual will guide you.
  • Be safe – Some fluids are toxic, so wash your hands and clean up spills.
There you have it, mate—a solid, no-fuss guide to checking and topping up your car’s fluids. Doing these simple checks in your backyard shed can save you a heap of money and headaches down the road. Plus, you’ll have the satisfaction of knowing your car is in top-notch shape.

Need to stock up on any fluids? Head over to SuperSpares and grab what you need. Happy wrenching!