How to Choose the Right Engine Oil Viscosity Grade?
1 Answers
Methods for selecting engine oil viscosity grade: 1. Choose based on driving habits: For aggressive driving, frequent traffic jams, or extensive highway driving, select higher viscosity grades; for gentle driving and stable urban commuting, opt for lower viscosity grades. 2. Consider mileage: When a vehicle reaches certain mileage, normal engine wear increases component clearances, requiring a switch to one viscosity grade higher. 3. Select according to vehicle type: Japanese and Korean cars with relatively precise engines typically use 20-grade viscosity; German vehicles (especially Volkswagen) demand higher viscosity - 40-grade oils meet required high-temperature shear values and kinematic viscosity standards; Chinese and American cars generally use 30-grade viscosity oils.