What is the oil specification for summer?

[LaPeyton]

In summer, the recommended oil specifications are 10W40 or 10W30, which are clearly marked on the oil bottle. During summer use, while ensuring proper lubrication, it's advisable to choose oil with lower viscosity based on the temperature range, engine temperature, and actual vehicle condition. For engines in good condition with minimal wear, lower viscosity oil is preferable. For engines with significant wear and larger clearances, slightly higher viscosity oil may be more appropriate. Engine oil, also known as engine lubricant, serves multiple functions including lubrication and wear reduction, auxiliary cooling, sealing and leak prevention, rust and corrosion protection, as well as shock absorption and buffering.