What is the importance of using the manufacturer's recommended oil viscosity?

Using the manufacturer's recommended oil viscosity is crucial for ensuring proper lubrication under various operating conditions. Different viscosities have specific properties that allow engine oil to perform optimally based on temperature, load, and speed. The right viscosity ensures that oil can effectively flow through the engine during cold starts and maintain adequate film strength at high temperatures. This minimizes wear and tear on engine components, helping to prevent damage and extend the life of the engine.

An incorrect viscosity might lead to inadequate lubrication during critical moments, such as engine start-up or at high operational temperatures, potentially resulting in increased friction, overheating, and ultimately, engine failure. The manufacturer's recommendations are based on extensive testing and understanding of how the engine operates in different climates and usage scenarios, reinforcing the importance of following such guidelines for reliable engine performance.