What is the difference between 0W-40 and 5W-40?
1 Answers
5W-40 and 0W-40 are both oil grades, and the only difference between them is their resistance to external low temperatures: 5W in 5W-40 oil represents a resistance to external low temperatures of -30°C; 0W in 0W-40 oil represents a resistance to external low temperatures of -35°C. Below is more information about oil grades: 1. Oil grades include two parts: classification and viscosity specifications. Oil grades usually indicate viscosity and quality. The viscosity of lubricating oil is often identified using SAE grades, where SAE is the abbreviation for the "Society of Automotive Engineers" in English. 2. The number following the oil classification indicates its viscosity specification. The smaller the number before the W, the better the oil's low-temperature fluidity, meaning it can be used in lower environmental temperatures and provides better engine protection during cold starts. 3. The number after the W represents the oil's kinematic viscosity at 100°C. The higher the number, the higher the viscosity.