Do Petrol Stations Sell Brake Fluid?

Yes, most petrol stations have a generic brake fluid available.

Is it possible to buy brake fluid for my car?

There are several different types of brake fluid that you can use in your car. However, they are divided into two categories:

  • Glycol-based braking fluids, such as DOT3, DOT4, and Super DOT4, are examples.
  • Silicone-based DOT5 brake fluid is an example of a silicone-based brake fluid.

DOT4 is commonly used in most automobiles. However, you will need to reference your vehicle’s handbook to determine which braking fluid you should use.

The ‘dots’ in different types of braking fluid correspond to the boiling point of the fluid; normally, the lower the ‘DOT’ number (for example, DOT3), the lower the boiling point of the fluid. The degree of ‘DOT’ required for your braking fluid will be determined by how you drive your car. Due to its lower boiling point, a high performance driven car, such as one used for racing or driving through rural mountainous areas, will most likely require a brake fluid with a higher DOT rating.

Is it possible to simply top up the brake fluid?

Do not rely on your dashboard warning lights to alert you when your brake fluid level is low; instead, check it every few months.

  • To adequately fill the brake system, drive your car for a brief time while braking multiple times.
  • Place your car on a level surface.
  • On a slope, this may result in an inaccurate reading.
  • Locate the brake fluid reservoir under the hood. If you’re not sure where to look, consult your vehicle’s owner’s manual.
  • The reservoir should be painted white and marked on the outside with ‘low’ and’maximum’ fill marks. Through the reservoir container, the fluid, which is a relatively dark liquid, should be visible.

If your brake fluid level falls below the ‘low’ mark, you should top it off.

If you check the level again soon after and it still low, you may have a brake system leak. Brake pads that have become worn can also cause this. When brake calipers become worn, they have to move further, which draws more brake fluid into the system. You should see a mechanic as soon as possible in both circumstances.

The fluid may be absorbing water from a weak location in the braking system if the level is higher than the maximum limit. If you continue to drive with water in your braking system, the water will eventually boil away (brake fluid has a higher boiling point than water), causing your brakes to fail. If your brake fluid level is above the maximum, take it to a shop to be replaced.

Is there a difference between brake oil and brake fluid?

Hydraulic braking fluid is just one of many applications for hydraulic oil. Depending on the manufacturer, hydraulic brake fluid is made of refined mineral oil or water. It’s essentially a type of hydraulic oil designed specifically for braking.

Is there a specific brake fluid that I need in my car?

Brake fluid is an important part of the braking process because it helps transfer the movement and force exerted when you depress the brake pedal. When you brake, you generate a lot of heat. Moisture might condense in the brake hydraulic system due to the extreme heat.

This moisture is absorbed by the brake fluid, which keeps it from boiling and causing brake failure. In addition, brake fluid prevents corrosion by acting as a lubricant for all moveable elements. It has to be able to stay fluid at all times.

When you press down on the brake pedal, brake fluid helps to transfer the movement and force exerted.

Adding brake fluid isn’t normally part of a vehicle’s scheduled maintenance. Low brake fluid usually indicates that your brake pads are worn out and will need to be replaced soon. If your brake fluid level drops suddenly, it could indicate a problem with your brake system or that you need to replace your brakes. If you’re not sure, have your brakes checked by a mechanic.

Dot brake fluid types

There are four different types of braking fluid available:

*DOT 3 and DOT 4 are glycol-based fluids, as is DOT 5.1. DOT 5 is a silicone-based substance. The key difference between DOT 3 and DOT 4 and DOT 5.1 is that DOT 5 does not absorb water.


The Department of Transportation is abbreviated as DOT. The Department of Transportation (DOT) established specifications for brake fluid to be used in automobiles in the United States. This is to ensure a consistent product quality for everyone’s safety.


  • In a vehicle that uses DOT 3 or DOT 4, never use DOT 5 fluid.
  • You can use DOT 4 in a DOT 3 car, but not the other way around.
  • Never use any other fluid as a substitute for brake fluid.
  • Spilling brake fluid can harm painted surfaces and finishes.
  • After coming into contact with brake fluid, wash your hands.
  • In autos with ABS brakes, DOT 5 does not mix well with glycol fluids.

What Brake Fluid to Use?

Check your owner’s manual to see what sort of brake fluid your vehicle requires. You can also look at the master cylinder reservoir top to see what kind of brake fluid your car uses.

What happens if you don’t have enough brake fluid?

Is your brake pedal soft, spongy, loose, or even bouncy when you step on it? Is it necessary to press the brake pedal all the way to the bottom before your vehicle slows and stops? This is a hint that your brake fluid needs to be changed.

Due to a lack of braking fluid, air will enter the gaps in your brake line, resulting in soft brakes. Spongy brake pedals can be frightening and dangerous, especially if you don’t get them repaired as soon as you notice a problem.

Is it possible to use engine oil as braking fluid?

Respectfully, Tom and Ray: I’m a complete moron. I just filled my master cylinder with synthetic motor oil. Am I doomed to fail?

Ray: Not until you, Lisa, drive the automobile. You should be alright if you leave it parked.

Tom: Lisa, this is a difficult problem. The ethylene propylene diene monomer seals in the brake components, according to Bosch’s brake engineers, are only compatible with glycol-based fluids.

Tom: Mineral oils are used in all types of motor oils, including synthetic ones. Mineral oils and rubber don’t mix well, which is an issue. Because there are so many rubber seals in your brake system, the oils can cause them to bulge or flex, causing your brakes to jam, leak, or even fail.

Ray: As a result, the safest course of action is to replace all rubber seals in your brake system. Except for the steel brake lines, that’s pretty much it! That’s going to cost a lot of money.

Tom: If you haven’t driven the car yet and haven’t combined the synthetic oil with the brake fluid, a less drastic measure would be to siphon as much as you can from the brake-fluid reservoir. With any hope, you’d be able to get the most of it out that way.

Ray: You could then disconnect the brake lines from the master cylinder and flush the cylinder without sending any tainted brake fluid down the lines.

Tom: Alternatively, because the master cylinder is the component whose seals are most likely to be impacted by the oil, you might just replace it.

Ray: Once you have a clean master cylinder, you may reconnect the brake lines and flush the remainder of the system by bleeding all four wheels.

Tom: But keep in mind that you’d be cutting corners with your brakes. So have the automobile towed to a reputable mechanic and ask him to determine how much oil has gotten into the brake fluid and how far it has traveled. Then, before deciding on a plan of action, you can acquire his best counsel.

Ray: I’d probably take a chance if it was my brother’s automobile. If it were an actual car, however, I’d definitely go with replacement parts.

Tom: And if you think you’re an idiot now, Lisa, wait till you see the cost for that job and the phrases that spring to mind. Best of luck!

Do you have a question concerning automobiles? Write to King Feature Syndicate Group, 300 W. 57th St., New York, NY 10019, attn: Click and Clack Talk Cars.

Is it possible to use baby oil as braking fluid?

Mineral oil is used in all of Shimano’s brakes. The real material is thin and particularly prepared (at least according to Shimano) to have a high boiling point. In an emergency, baby oil might be used, but its higher viscosity could impact performance, and it may have a lower boiling point than the real thing.

Is it safe for me to drive if my brake fluid is low?

When your brake fluid is low or gone, it’s critical to take precautions to ensure your safety. As previously stated, a lack of brake fluid or a lack of braking fluid can impair your capacity to stop. There’s a chance, though, that you’ll be able to safely stop.