Manufacturers have created low viscosity formulations of DOT 4. Viscosity is measured by how brake fluid spreads over a surface in a measured amount of time.
Ultra-premium brake fluid is designed to perform in extreme environments and deliver reliable brake system operation due to its low-temperature viscosity.
Dry boiling points are the point that a new package of brake fluid boils at, while wet boiling points are measured after the brake fluid absorbs moisture.