What should you do if you don't have the specified DOT 4 brake fluid available?

When dealing with brake fluid, it is essential to use the fluid specified by the vehicle manufacturer for several critical reasons. Brake fluids, including DOT 4, have different chemical properties, boiling points, and compatibility with brake system materials. If you use an alternative type of fluid that doesn’t meet the specifications, it can lead to brake system failure, reduced braking efficiency, or damage to components.

Waiting until you have the correct DOT 4 brake fluid ensures that the vehicle operates safely and effectively. Using a fluid that does not meet the requirements can potentially compromise the brake system's integrity. While options that suggest using other types of fluids or performing no service may seem practical, they risk serious safety implications by not adhering to manufacturer specifications. Therefore, the most responsible course of action is to wait to fill the reservoir with the correct type of fluid.