Using motor oil for brakes on a bike can have serious consequences and is highly discouraged. Here are the potential consequences of using motor oil as brake fluid:
Reduced Braking Performance: Motor oil is not designed to function as brake fluid. It lacks the specific properties required for effective brake operation, such as high boiling point, appropriate viscosity, and proper lubrication characteristics. As a result, using motor oil in the brake system can significantly reduce braking performance, leading to longer stopping distances and compromised safety.
Brake Fade and Overheating: Brake systems generate significant heat during braking. Brake fluid is formulated to have a high boiling point to withstand these elevated temperatures. Motor oil, on the other hand, has a lower boiling point compared to brake fluid. When exposed to high temperatures, motor oil can quickly reach its boiling point, resulting in brake fade, loss of braking power, and potential brake fluid vaporization. This can be extremely dangerous and lead to complete brake failure.
Brake Seal and Component Damage: Brake systems rely on rubber seals and components to maintain proper hydraulic pressure and ensure effective brake operation. Motor oil can deteriorate and damage these rubber components, leading to leaks, reduced braking force, and potential brake system failure. The seals can become swollen or deteriorated, compromising their ability to maintain a proper seal and causing fluid leakage.
Contamination and Corrosion: Motor oil contains additives and contaminants that are not suitable for brake systems. If motor oil is introduced into the brake system, it can contaminate the brake fluid, causing it to lose its proper properties. This contamination can lead to corrosion and damage to various brake system components, including calipers, brake lines, master cylinder, and ABS (anti-lock braking system) components.
Safety Risks: Using motor oil as brake fluid poses a significant safety risk. Impaired braking performance, brake fade, and the potential for brake failure can lead to accidents, loss of control, and severe injuries to the rider, passengers, and others on the road.
It is crucial to use the appropriate brake fluid recommended by the motorcycle manufacturer for the specific braking system. Brake fluids are formulated to meet specific performance standards, ensuring optimal brake performance, heat resistance, and compatibility with brake system components. If you suspect your brake system has been contaminated with motor oil or any other inappropriate fluid, it is essential to have it inspected and serviced by a qualified mechanic to restore safe and reliable braking performance.