Is Diesel Engine Lubricating Oil the Same as Motor Oil?
2 Answers
Diesel engine lubricating oil is specifically diesel engine oil, as motor oil is categorized into diesel engine oil and gasoline engine oil. Below is a relevant introduction: Working Principle: Driven by the motor, the crankshaft rotates, which in turn drives the engine's connecting rod mechanism, valve train, fuel supply system, etc. After the intake and compression strokes, the temperature of the compressed air at the end of compression exceeds 700 degrees Celsius. At this point, high-pressure diesel is injected into the cylinder in a mist-like form from the injector, forming a combustible mixture that ignites immediately, pushing the crankshaft to continue rotating. Compression-Ignition Diesel Engine: A diesel engine compresses the mixture of air and fuel directly to the ignition point, causing spontaneous combustion, hence the term compression-ignition. It does not require an external spark to ignite, so it does not use spark plugs. In contrast, gasoline engines have a lower compression ratio compared to diesel engines and require an ignition source to ignite the gas in the cylinder.
I think diesel engine oil is essentially the same as motor oil, because I used to drive a diesel truck and often needed this stuff. The core function of motor oil is to lubricate the pistons and bearings inside the engine, reducing wear and dissipating heat. Diesel engine oil is specifically designed to handle the extra soot and high temperature and pressure produced by diesel combustion, while gasoline engine oil focuses more on the cleaning needs of gasoline engines. If you drive a diesel vehicle, make sure to choose oil with a CD or CJ label, such as those classified by API. Using regular gasoline engine oil might not show immediate problems, but over time it can lead to increased carbon buildup and reduced power. For routine maintenance, check the oil level and color every 5,000 kilometers—it can save you a lot on repair costs.
