A substance able of decreasing friction by creating surfaces smooth or slick. That's been farval lubrication system. The braking system on your car trigger it to slow and stop by using friction. The braking system pads press against the blades or drum in the wheel, if it's a drum crack or a disk brake. Using oiling on a system that needs friction might seem like a poor idea, but the correct lubrication is essential to proper brake functionality.