No, engine oil should not be used for lubricating or servicing disc brakes. Disc brakes and engine systems have different requirements and use different types of lubricants.
Engine oil is designed specifically for lubricating and cooling internal combustion engines. It is not suitable for use on disc brakes because it can cause the brake pads and rotor surfaces to become contaminated, reducing the braking performance and potentially causing safety issues.
Disc brakes require specialized brake fluids that are designed to withstand high temperatures and provide the necessary friction for efficient braking. The most commonly used type of brake fluid is called DOT (Department of Transportation) fluid, which comes in different specifications such as DOT 3, DOT 4, and DOT 5.1. These brake fluids have specific properties that make them compatible with the rubber seals and components used in disc brake systems.
It's important to use the correct type of brake fluid recommended by the manufacturer for your motorcycle's braking system. Using the wrong fluid or any other type of lubricant, including engine oil, can compromise the braking performance and safety of your motorcycle. If you are unsure about the appropriate brake fluid to use or need to service your disc brakes, it is recommended to consult the motorcycle's owner's manual or seek assistance from a qualified mechanic.