AMSOIL DOT 3-4 High-Performance Synthetic Brake Fluid feature pure base stocks and robust additives that resist boil-off and the effects of water contamination more effectively than conventional brake fluids. AMSOIL Synthetic Brake Fluids deliver superior high-temperature performance in auto/light-truck, high-performance, racing and powersports applications.
CONTAMINATION Water contaminates the brake system by seeping through microscopic pores in flexible brake lines and seals and through the reservoir fill cap when opened. Once inside, it quickly works to corrode brake parts, lines and seals, leading to eventual system failure. AMSOIL Synthetic Brake Fluids keep water in suspension, slowing its corroding effects. They lubricate and protect intricate braking components despite the inevitable water absorption associated with braking systems, delivering long-lasting performance.
BOIL-OFF The extreme pressure and high heat common to braking can push conventional brake fluid beyond its boiling point, causing it to vaporize, or boil-off. Even more problematic, water contamination can drop the boiling point of conventional fluid below safe standards, accelerating the rate at which it boils off. This leads to a spongy or unresponsive feeling in the brake pedal. In contrast, the unique chemistry behind AMSOIL Synthetic Brake Fluids increase their boiling point temperatures well beyond Department of Transportation (DOT) standards even when contaminated with 3.7 percent water (see chart). They 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 consistent, safe braking.