Dismantling of numbering structure

The meaning of "W" (Winter)

First digit (e.g. 5W) → Low temperature fluidity

Last digit (such as 30) → High temperature viscosity

Low temperature performance (digits before W)

Comparison of 0W, 5W, and 10W: Applicable temperature range (0W=-35 ° C, 5W=-30 ° C, 10W=-25 ° C)

Recommended 0W or 5W for cold northern regions

High temperature viscosity (number after W)

The difference between 20/30/40: the larger the number, the stronger the high-temperature protection

Japanese cars commonly use 20/30, German cars commonly use 40

How to choose based on vehicle model?

Turbocharged car → 5W-40 with high temperature and viscosity

Hybrid car → Low viscosity 0W-20

Old car → Increase viscosity appropriately (such as 10W-40)

Special labels (such as SN/SP, C3)

API quality level (SP>SN)

ACEA European Standard (C3 is suitable for vehicles with particle traps)