Is driving 3 kilometers each time harmful to the car?

[VanGia]

Driving 3 kilometers each time is harmful to the car. Here are the relevant explanations: Main reasons: The primary reason driving 3 kilometers harms the car is that the lubricating oil has not fully lubricated all the lubrication surfaces after the vehicle starts. It takes a long period of engine operation for the lubricating oil to provide full lubrication and protection to all moving surfaces, and a protective film has not yet formed on the cylinder walls. For a distance of about 3 kilometers, the lubricating and protective effects of the oil have not fully taken effect, leading to excessive wear on the vehicle. Engine aspects: Even driving 1 kilometer is harmful to the car. Since the engine coolant temperature cannot rise to the normal operating temperature, the lubrication provided by the oil to the engine is very poor, resulting in significant engine wear. Moreover, to reach the working temperature as quickly as possible, the engine control unit injects more fuel into the cylinders to accelerate combustion. This not only wastes fuel but also leads to incomplete combustion of gasoline, causing valve coking and severely affecting the engine's lifespan.