What is the Difference Between Summer and Winter Engine Oil?

[VonNoah]

Viscosity differs, with winter engine oil having lower viscosity and summer engine oil having higher viscosity. Below is relevant information: 1. Winter temperatures are low, and using oil with excessively high viscosity can lead to insufficient fluidity, increasing engine wear and resistance. Summer temperatures are high, and using oil with excessively low viscosity can result in inadequate lubrication. 2. The important functions of engine oil rely on a key characteristic, namely viscosity. Only when the oil possesses viscosity characteristics can it provide a protective film for various operating parts of the engine. Generally, the viscosity referred to is a physical property of the oil (while the viscosity index is a physicochemical indicator of the base oil), originally meaning the degree of difficulty in the flow of fluids or semi-fluids, commonly referred to as 'thick' or 'thin'.