Comma BF51L Dot 5.1 Synthetic Brake Fluid, 1 Liter

Product Information

DOT brake fluid is required to meet strict standards and specifications set out by the Society of Automotive Engineers and the Department of Transportation (DOT) - hence the name. These standards centre around maintaining brake fluid performance in a range of temperatures (high and low) and also specify the minimum boiling temperatures which the fluid manufacturers must adhere to. This type of fluid is different in a lot of things in comparison to the DOT 5. Namely, it is different in its structure. It also prevents localised corrosion of internal parts which can be caused by water pooling in the brake system. It is also more compressible than the other DOT brake fluids which can lead to a sluggish or spongy brake lever (or pedal) feel, and therefore requires special design considerations when used in brake systems. This improvement formula does not only contain ether glycol compound but also contains borate esters. This greatly improves the performance of this fluid and also allows it to run at really hot temperatures.

Solvent Diluent: The solvent diluent determines the boiling point and viscosity of the braking fluid. Between 50% and 80% of the braking fluid is made up of it. Glycol ether is the most used solvent diluent.Now let’s discuss the DOT 5 brake fluid, how the DOT 5 is different in comparison to other types of brake fluids that are out there? When it comes to changing from one to another fluid we would not recommend you to do so. Even though it is possible to do this type of work on your car. DOT (Department of Transport) 4 is one of the most commonly used types of brake fluid that’s based on glycol ether. It’s pretty similar to DOT 3 brake fluid but contains borate-ester additives. Castrol recommends that DOT fluid in previously opened containers should be discarded after 12 months. In our opinion it would be unwise to use DOT fluid from a bottle which has been open for more than a few months, unless you have no other alternative.

DOT 5.1 is not a revision of DOT 5, as is commonly believed. DOT 5.1 is a mixture of borate ester and polyalkylene glycol ether, a silicone-based product. If you allow your brake fluid to continue absorbing water beyond 3.7% by volume, which it will do if it doesn't get changed, the boiling point will continue to decrease. After reaching about 8% by volume, the boiling temperature will only be around 100 degrees Celsius. The thing to note is that the dry boiling temperature is the temperature when we consider using DOT 3 from a new container. Meaning that this fluid is totally fresh. While the wet boiling temperatures are when this fluid is diluted with water. How simple is removing some to reduce the level? Is it as simple as taking the cap off and using a syringe to take fluid out of the tank, then replacing the cap, or is it always necessary to bleed the brakes?

Are you thinking of topping off the DOT 3 with the DOT 5 brake fluid? If this is the case, then you need to read this article first because the switch will not be that smooth after all and you could face a ton of issues.

Then we learned more about the pros and cons of the DOT 5 and how it outperforms other fluids as well as the comparison with the DOT 3. F.A.Q a b "ISO 4925:2005 - Road vehicles -- Specification of non-petroleum-base brake fluids for hydraulic systems". www.iso.org. Brake fluids must not corrode the metals used inside components such as calipers, wheel cylinders, master cylinders and ABS control valves. They must also protect against corrosion as moisture enters the system. Additives (corrosion inhibitors) are added to the base fluid to accomplish this. Silicone is less corrosive to paintwork than glycol-ether based DOT fluids. [14] Do NOT use DOT 5 in your motorcycle unless it is specifically recommended by the manufacturer. DOT 5 is usually not compatible with most motorcycles. DOT5 : DOT5 brake fluid has a dry boiling point of 260 degrees Celsius and a wet boiling point of 180 degrees Celsius.Most Brake fluids are manufactured to meet standards set by international, national, or local organizations or government agencies. The Mobil Brake Fluid DOT 5.1 500ml is a high-performance brake fluid. This is suitable for all disc, drum and anti-skid braking systems used in average to high-performance vehicles requiring DOT 3 or DOT 4 level performance. It is based on polyethylene glycol ether technology to provide the highest level of brake and clutch performance in modern as well as older model automotive and commercial vehicles. This is a synthetic fluid for hydraulic braking systems.

Eventually, DOT 5.1 should be popular. But for now, DOT 4 is the preferred brake fluid in most motorcycles since these vehicles are designed for DOT 4. Pros and Cons Unsurprisingly, a DOT 4 brake fluid lasts longer and has better characteristics than a DOT 3 brake fluid. What is good is that the DOT 4 is interchangeable when it comes to mixing with the DOT 3 since they are both glycol-based solutions. Before we dive into more complex topics such as the DOT 5 brake fluid, let’s first take a look at the basics of the brake fluid and also learn what this DOT abbreviation means in the first place. Knowing this will be a good starting point for beginners who are not into cars and want to learn the basic stuff.However, the fact that it’s unregulated could be viewed as an advantage to the manufacturer because it means they have full control over the process of manufacturing their brake fluid. AN EXPLANATION OF BRAKE AND CLUTCH FLUIDS". Xpowerforums.com. Archived from the original on 2008-11-04 . Retrieved 2015-05-26. DOT 5 is mostly used in military equipment. The long life and durability of DOT 5 suit these equipment pieces since these applications sit and stay idle for years at a stretch. Pros and Cons