In which season is 20W50 engine oil used?
2 Answers
20W50 is an all-season engine oil. Below is a detailed introduction to the types of engine oil models: 1. High-temperature type: such as SAE20-SAE50, where the number indicates the viscosity at 100*C. The higher the number, the higher the viscosity. 2. Low-temperature type: such as SAEOW-SAE25W, where 'W' indicates it is only for winter use. The smaller the number, the lower the viscosity and the better the low-temperature fluidity. 3. All-season type: such as SAE15W/40, 10W/40, 5W/50, indicating that the viscosity grade at low temperatures meets the requirements of SAE15W, 10W, and 5W respectively, and the viscosity grade at high temperatures meets the requirements of SAE40 and 50 respectively, making it suitable for both winter and summer use.
Having driven for many years, I find that 20w50 oil is most suitable for summer or hot seasons, and the reason is simple: when the weather is hot, engine temperatures soar, and ordinary oil tends to thin out and lose its protective properties, whereas 20w50 has higher viscosity, clinging tightly to parts to prevent friction and wear. I remember using it last July for a long highway trip—the engine temperature stayed stable without overheating, and performance was super smooth. However, it's not ideal in winter, especially in cold regions where its thickness makes cold starts difficult, straining the engine and consuming more fuel, so I switch to thinner oil earlier. Generally, May to October is the ideal period, but adjustments should be made based on local temperatures, ideally cross-checking with the vehicle's user manual. Regular maintenance combined with seasonal oil changes can extend engine life, saving both hassle and money.
