Oil film shear resistance

Shear resistance of the oil film – this is the ability of the lubricant to maintain its structure under high loads and rapid engine component movement. High resistance means that the oil film does not break down under shear forces, providing a stable protective barrier action and reducing wear. When selecting oil for high‑performance or turbocharged engines, as well as for operation under high‑rpm conditions, this parameter should be the focus, as it influences the service interval length and cooling efficiency.