Using car oil in a motorcycle is generally not recommended. Motorcycles and cars have different engine designs and operating conditions, and therefore require different types of oil.
Motorcycle engines often have higher RPMs, run at higher temperatures, and have a separate transmission system that shares the same oil as the engine. Additionally, motorcycles typically have a wet clutch system that is bathed in the engine oil. These factors put different demands on the oil compared to car engines.
Motorcycle-specific oils are formulated to meet the specific requirements of motorcycle engines and their wet clutch systems. They typically have additives that provide better lubrication and heat resistance, and they are designed to prevent clutch slippage and provide smoother gear shifting.
Using car oil in a motorcycle could lead to several issues, including reduced lubrication and increased wear on the engine and transmission components, inadequate clutch performance, and potentially even engine damage.
To ensure optimal performance and longevity of your motorcycle's engine and transmission, it's best to use a high-quality motorcycle-specific oil that meets the manufacturer's specifications. Always consult your motorcycle's owner manual or check with a reputable mechanic or dealership for the recommended oil for your specific model.