It is generally not recommended to mix different oils in a motorcycle engine. Mixing oils with different formulations, viscosities, or additive packages can potentially have negative effects on the engine and its performance. Here's why:
Oil properties and compatibility: Different oils are designed with specific formulations and additives to meet the requirements of various engines and operating conditions. Mixing oils with different properties can alter the overall oil composition, potentially compromising its ability to lubricate, protect against wear, and perform other essential functions.
Viscosity mismatch: The viscosity of the oil plays a crucial role in maintaining proper lubrication. Mixing oils with different viscosities can lead to an inconsistent oil film thickness, potentially causing inadequate lubrication or excessive friction within the engine components.
Additive interference: Oils often contain various additives to enhance their performance, such as detergents, dispersants, anti-wear agents, and friction modifiers. Mixing oils with different additive packages can disrupt the intended balance of these additives, potentially reducing their effectiveness or even causing chemical interactions that could be harmful to the engine.
Warranty concerns: Mixing oils that do not meet the manufacturer's specifications or recommendations may void the warranty provided by the motorcycle manufacturer.
To ensure optimal performance and protection for your motorcycle's engine, it is best to follow the manufacturer's guidelines regarding the recommended oil type, viscosity, and change intervals. If you need to change the oil, it is advisable to drain the existing oil completely and refill with a single type and brand of oil that is compatible with your motorcycle's requirements.
If you have concerns or specific requirements that deviate from the manufacturer's recommendations, it is always a good idea to consult with a knowledgeable mechanic or contact the motorcycle manufacturer for guidance before making any changes to the oil used in your motorcycle.