motorcycle oil:15w40

1. Smoother starting at medium and low temperatures: “15W” represents the low-temperature viscosity grade. Compared with engine oils with higher W values ​​(such as 20W), it has better fluidity when the ambient temperature is low (usually above -15°C), can quickly reach various lubrication parts of the engine, reduce dry friction during cold start, and reduce starting resistance.
2.Balanced protection under medium and high temperature conditions: “40” represents the high-temperature viscosity grade, which can maintain a stable oil film in the medium and high temperature environment of daily motorcycle driving (not extremely high speed or heavy load), providing reliable lubrication for engine pistons, valves and other components, while taking into account a certain fuel economy and avoiding increased engine operating resistance due to excessive oil viscosity.