Synthoils Store

DOT 3 and DOT 4 Synthetic Brake Fluid

Top rated by our customers

The extreme pressure and high heat common to brake systems can push brake fluid beyond its boiling point, causing it to vaporize or "boil-off." Water contamination can accelerate the process. This leads to a spongy or unresponsive feeling in the brake pedal (vapor lock). In contrast, the unique chemistry behind AMSOIL synthetic brake fluids increases boiling points well beyond DOT standards, even when contaminated with 3.7 percent water. AMSOIL Brake Fluids maintain a stable viscosity over a wide temperature range and flow easily at the high pressures generated in today's automotive brake systems to deliver solid, reliable braking. Maximum ABS and Traction-Control Performance AMSOIL DOT 3 & 4 Synthetic Brake Fluid's low-viscosity (817 cSt) provides superior cold-weather performance and excellent ABS and traction-control responsiveness. It covers a broad range of applications and exceeds DOT 3, 4 and 5.1 specifications.

BUY NOW

Recommendations

AMSOIL DOT 3 & 4 Synthetic Brake Fluid is engineered for use in passenger cars and light trucks. It is a DOT 5.1 product, exceeding the specifications of DOT 3 and DOT 4. Additionally, its 5.1 formula provides excellent protection against water contamination. Rather than offer multiple products, we created one formula that performs best in all three applications.

DOT 3 & 4 Synthetic Brake Fluid is also the primary recommendation for powersports applications. However, if a customer consistently pushes his or her brakes to the limit in racing (or similar applications), DOMINATOR DOT 4 Synthetic Racing Brake Fluid is recommended.

Refer to the owner’s manual regarding the proper change interval for your brake fluid and to determine the correct DOT classification. Change AMSOIL DOT 3 & 4 Synthetic Brake Fluid twice a year for maximum performance. Change AMSOIL DOMINATOR DOT 4 Synthetic Racing Brake Fluid once a year for maximum performance.