Using thicker engine oil than recommended by the motorcycle manufacturer can have several potential drawbacks and negative effects. While it's essential to consult your motorcycle's manual for specific recommendations, I can provide some general insights.
Poor Lubrication: Thicker oil may not flow as effectively as the recommended viscosity, leading to inadequate lubrication of engine components. This can result in increased friction, excessive wear, and potentially damage to critical engine parts.
Reduced Fuel Efficiency: Thicker oil requires more energy to circulate through the engine, which can increase drag and reduce fuel efficiency. You may notice a decrease in mileage or poorer performance as a result.
Increased Engine Temperature: Thicker oil may impede heat dissipation, leading to higher engine temperatures. Excessive heat can degrade the oil's performance and potentially damage engine components, such as seals and gaskets.
Difficulty in Cold Starts: Thicker oil tends to have higher viscosity, making it more challenging for the engine to turn over during cold starts. This can result in increased strain on the battery, starter motor, and other components, potentially leading to starting issues.
Impaired Oil Circulation: Thicker oil may have difficulty flowing through narrow oil passages and lubrication channels, which can hinder its ability to reach all the necessary parts of the engine. This can lead to insufficient lubrication and increased wear on specific components.
It's always recommended to follow the manufacturer's guidelines for oil viscosity and change intervals to ensure optimal engine performance, longevity, and reliability. If you have any concerns or are considering using a different oil viscosity, it's best to consult a qualified mechanic or the motorcycle manufacturer for their expert advice.