Unlike the elusive and oft-memed blinker fluid, brake fluid actually exists. Even more than that, it's one of the more important components of vehicular safety. As the name implies, it's a fluid ...

DOT 3 Brake fluid: Comes in clear or yellow, but will sometimes have blue, green, and red shades. DOT 4 Brake fluid: Comes in Light yellow or crimson red shades. DOT 5 Brake fluid: Comes in Purple ...