What is generally considered when selecting lubrication oil for diesel engines?

When selecting lubrication oil for diesel engines, the viscosity and quality of the oil are critical factors. Viscosity refers to the oil's thickness and its ability to flow at various temperatures. It must be suitable for the engine's operating conditions, ensuring that the oil can adequately lubricate moving parts, reduce friction, and prevent wear.

High-quality oil typically contains additives that enhance its performance, providing better resistance to oxidation, thermal breakdown, and sludge formation. These properties are essential for maintaining engine efficiency and longevity. Therefore, focusing on oil viscosity and quality helps ensure the diesel engine operates smoothly and reliably, which is why this aspect is paramount in the selection process.

While cost, environmental factors, and brand recognition can influence decisions, they do not directly impact the oil's performance in the engine to the same extent as viscosity and quality do.