In which season should 15w50 engine oil be used?
1 Answers
15w40 engine oil is winter oil, where 'w' stands for winter. The number before 'w' represents the freezing point temperature, with 15w corresponding to a freezing point of -20℃. The number after 'w' indicates the kinematic viscosity of the oil at 100℃, with higher numbers indicating higher viscosity. Related information: 1. Engine oil: Also known as engine lubricant, with a density of approximately 0.91×10³(kg/m³), it serves to lubricate and reduce friction, assist in cooling, seal against leaks, prevent rust and corrosion, and provide shock absorption for the engine. It is often referred to as the 'blood' of the car. 2. Meaning of the numbers: The number before the letter indicates the lower environmental temperature at which the oil can be used, with better engine protection during cold starts. The number after the letter represents the oil's high-temperature resistance, with higher numbers indicating better protective performance at high temperatures.