Using a different viscosity oil than what is recommended by the manufacturer can have an impact on the performance and protection of your bike's engine. It is generally not recommended to use 20W50 engine oil instead of 10W30 unless explicitly specified by the manufacturer. Here's why:
Viscosity: The numbers in the oil's viscosity rating, such as 10W30 or 20W50, indicate its flow characteristics at different temperatures. The first number, followed by "W" (winter), represents the oil's viscosity in colder temperatures, while the second number represents its viscosity at operating temperature. Using a higher viscosity oil, like 20W50, may lead to slower flow during startup and potentially inadequate lubrication in colder conditions.
Lubrication: Different engines have specific oil requirements based on their design, clearances, and operating conditions. The manufacturer determines the recommended viscosity to ensure proper lubrication and optimal performance. Using an oil with a higher viscosity than recommended may result in reduced lubrication and increased friction, potentially leading to excessive wear, decreased fuel efficiency, and compromised engine performance.
Oil Consumption: If your bike is consuming engine oil at a significant rate (100-200ml less at every oil change), it is important to identify and address the underlying issue. Excessive oil consumption can be a sign of engine problems, such as worn piston rings, valve seals, or gaskets. Simply using a higher viscosity oil is unlikely to solve the underlying problem and may even mask the symptoms temporarily.
To address the oil consumption issue, consider the following steps:
a. Check for Leaks: Inspect your bike for any oil leaks, including around the engine, oil filter, drain plug, or other components. Addressing leaks can help prevent oil loss and consumption.
b. Seek Professional Inspection: If the oil consumption persists, it's advisable to have a professional mechanic examine your bike's engine. They can diagnose the issue more accurately and recommend appropriate repairs or maintenance.
c. Follow Manufacturer Recommendations: Stick to the recommended engine oil viscosity specified by the manufacturer. This ensures that your bike's engine receives the proper lubrication and protection.
In summary, it's generally not recommended to substitute a different viscosity oil than what the manufacturer recommends. Instead, address the oil consumption issue by identifying the root cause and seeking appropriate repairs or maintenance.