Is there a motor oil viscosity grade chart?

[DeRylee]

The viscosity grade of motor oil is closely related to the vehicle model and local temperature. Below is the explanation of its connection with vehicle models and local temperatures: 1. Vehicle model: Japanese cars prefer low-viscosity oil, while German cars prefer high-viscosity oil. 2. Local temperature: (1) 0W suitable temperature — -35°C (polar regions) (2) 5W suitable temperature — -30°C (northeast and northwest regions) (3) 10W suitable temperature — -25°C (north-central and southwest regions) (4) 15W suitable temperature — -20°C (north-central and southwest regions) (5) 20W suitable temperature — -15°C (areas south of the Yellow River and north of the Yangtze River) (6) 25W suitable temperature — -10°C (subtropical regions)