Is Higher or Lower Engine Oil Viscosity Better?

[DiKimberly]

There is no definitive answer to whether higher or lower engine oil viscosity is better. The viscosity of engine oil should be selected based on the vehicle model. As a type of machinery, engines have specific requirements for lubricating oil that share common aspects with general machinery, such as the need for appropriate viscosity, certain anti-oxidation, anti-wear, anti-corrosion, and viscosity-temperature properties. Below is an introduction to engine oil: 1. Composition of engine oil: Engine oil is the lubricating oil used by engines, consisting of base oil and additives. 2. Density and functions of engine oil: The density of engine oil is approximately 0.91×10³ (kg/m³), and it serves functions such as lubrication and wear reduction, auxiliary cooling, sealing and leak prevention, rust and corrosion protection, and shock absorption.