WHAT IS DOT FLUID?

If you've ever wondered what is DOT fluid, it’s a specialized type of hydraulic brake fluid used in vehicles to ensure smooth and reliable operation of the braking system. DOT fluid is a blend of glycol ethers and borate esters, formulated with a high boiling point to resist vaporization and perform effectively under high-temperature conditions. DOT fluid is classified into four categories: DOT 3, DOT 4, DOT 5, and DOT 5.1.

 

DOT 3 and DOT 4 fluids are the most common and are compatible with most vehicles. DOT 3 fluid has a lower boiling point than DOT 4, making it less expensive but also less effective in high-performance vehicles. DOT 4 fluid is suggested for high-performance vehicles.

DOT 5 fluid is silicone-based and is incompatible with vehicles that use DOT 3, DOT 4, or DOT 5.1 fluids. It is commonly used in military and industrial applications. DOT 5.1 fluid is a high-performance fluid that is similar to DOT 4 but has a higher boiling point.

It is important to use the correct type of fluid for your vehicle, as using the wrong type can cause damage to the brake system. Brake fluid should be checked regularly and replaced as needed, typically every two years. If you notice any changes in the brake pedal feel, or the brake warning light comes on, have your brake system checked by a professional technician at Northrich Automotive. We can help you stay up to date with the regular maintenance of your brake system.