What is the difference between 0W20 and 0W30?

[MacCalvin]

The differences between 0W20 and 0W30 include varying oil viscosity, different oil film thickness, and varying degrees of fuel efficiency. Here are the detailed explanations: 1. Different oil viscosity: The number after the 'W' in the oil grade represents the high-temperature viscosity rating of the oil. This indicates the likelihood of the oil thinning at high temperatures. The larger the number, the higher the viscosity, and the higher the applicable environmental temperature, indicating better high-temperature stability and fluidity of the oil. In terms of performance between 0W20 and 0W30, the 30 grade has slightly higher viscosity than the 20 grade. 2. Different oil film thickness: Compared to 0W20, 0W30 oil can form a thicker oil film, preventing engine cylinder wear and other phenomena. 3. Different degrees of fuel efficiency: 0W20 oil is thinner than 0W30, but this also means better fluidity, less resistance during machine operation, and better fuel efficiency.