How to distinguish between winter engine oil and summer engine oil? What season is 10W-30? What are they?

Hello, winter oil is divided into 0w, 5w, 10w, 15w, 20w and 25w, where w stands for the abbreviation of winter. The smaller the number before W, the lower the low-temperature viscosity, the better the low-temperature fluidity and the lower the applicable minimum temperature.

Summer oil content is 20, 30, 40 and 50. The larger the number, the higher the viscosity and the higher the applicable maximum temperature.

Commonly used in winter and summer are 5w/20, 5w/30, 5w/40, 5w/50, 10w/20, 10w/30, 10w/40, 10w/50,/kloc.

According to North China, it is 10w/30 in winter and 15w/40 in summer.

I hope it helps you. Ask the car master about the car. 4S shop professional technician, 10 minutes to solve.