Can I mix synthetic brake fluid with regular?

Yes, you can switch between fluid labelled as “synthetic” or regular brake fluid and you can mix synthetic and regular brake fluids. ALL brake fluid is “synthetic” in that it is not made from any petroleum products; it’s a “lab” manufactured product.

Is synthetic brake fluid the same as regular?

According to the page, all brake fluids are technically “synthetic” in that they are man made and do not contain a petroleum base. “Synthetic” brake fluid, as we think of it, has a silicon base. Non-synthetic brake fluid (normal brake fluid) is glycol based. There are trade offs to each type.

Does it matter if brake fluid is synthetic?

Some very high-end synthetic DOT 4 and 5.1 synthetic fluids can give a better pedal. But, it is so small of a difference that only the very, very, very best drivers can feel it. Some silicone-based fluids can provide a softer pedal because it is more compressible than glycol-based fluids.

Can you mix DOT 3 and DOT 4 Synthetic brake fluid?

Are DOT 3 and DOT 4 brake fluid compatible? Yes, DOT 3 brake fluid is compatible with DOT 4 brake fluid. However, DOT 4 offers a higher boiling point. DOT 5.1 is used in high-performance and heavy-duty applications due to its high boiling point.

Is synthetic DOT 3 brake fluid compatibility?

Lucas Synthetic Brake Fluid DOT 3 is a high quality blend of polyethylene glycol ethers and additives which meet or exceed the industry minimum dry boiling point of 401°F. Lucas Synthetic Brake Fluid DOT 3 is compatible with all brake system rubber components and other brake fluids.

What brake fluid can you mix?

Since DOT 4 and 5.1 are both glycol-based brake fluids they are compatible with each other, which means they can be readily mixed without harming your brake system. It is important never to mistake DOT 5.1 (glycol-based) with DOT 5 which is silicone-based and should never be mixed with any other DOT fluid.