Is the engine oil for diesel cars the same as that for gasoline cars?
1 Answers
Diesel engine oil and gasoline engine oil are not the same. The specific differences are as follows: 1. Diesel engine oil with the same viscosity grade has a higher viscosity than gasoline engine oil. If diesel engine oil of the same viscosity grade is used in a gasoline engine, it will cause problems: (1) It will lead to excessive engine temperature. The viscosity of diesel engine oil is greater than that of gasoline engine oil, resulting in greater friction, which causes the engine temperature to rise. The increase in temperature accelerates oil deterioration, reducing the lifespan of the oil. (2) It increases wear during cold starts. If the oil viscosity is too high, the oil supply is too slow during cold starts, especially in extremely cold climates. Although the oil pressure is high, the pumpability of the oil is poor, leading to dry friction, which is the main cause of engine wear. 2. The oil grades are different. The API grade represents the quality grade of engine oil, which is generally divided into two categories: the S series represents oil for gasoline engines, and the C series represents oil for diesel engines. If the oil has both S and C labels, it is a universal oil suitable for both diesel and gasoline vehicles. Diesel engine oil cannot be used in gasoline engines, and gasoline engine oil cannot be used in diesel engines. The additives are different, and interchanging them will cause engine damage.
