Which is better for Civic: 0W20 or 5W30 engine oil?

[CalvinAnn]

Civic 0W20 is more suitable for northern regions, while 5W30 is better suited for southern areas with warmer climates and less demanding low-temperature requirements. Below is an introduction to engine oil viscosity grades: 5W-40 is the viscosity rating of engine oil, which is the most important reference indicator when selecting oil. The viscosity rating consists of two parts: 'before W' and 'after -'. First, let's explain the meaning of W. Here, W is not variable like the SN mentioned above; it is always displayed as W. 0W indicates usability at an external temperature of -35°C, while 5W indicates usability at -30°C. Clearly, the number before W represents low-temperature viscosity, with smaller numbers being better. For example, 0W has better fluidity at ultra-low temperatures compared to 5W, with lower viscosity and a broader applicable low-temperature range. 0W and 5W are currently the most common ratings for synthetic oils on the market, while 10W is mainly found in lower-end oils, and higher numbers are rarely seen.