What type of oil does DD250E use?

[LeFrancisco]

DD250E uses 10W40 grade engine oil. Application range: The number 10 indicates the minimum applicable temperature of the oil is -25°C, W stands for Winter, and 40 represents the high-temperature viscosity of the oil, with a kinematic viscosity of 14.5cst at 100°C. The preceding number denotes the oil's low-temperature fluidity - the smaller the number, the better the low-temperature fluidity. The number after W indicates the oil viscosity grade at 100°C. Importance of viscosity: Lubricating oil must have sufficient viscosity to prevent wear between moving parts and to form an oil film between moving components at various operating temperatures. However, the oil's fluidity shouldn't be so high as to affect engine startup, while generating minimal friction under continuous operation conditions. Using oil with excessive viscosity will increase component wear.