What are the effects of not changing engine oil for a long time?
1 Answers
If engine oil is not changed for a long time, it will cause the following effects: 1. As the oil's lifespan declines, its lubricating ability will also rapidly decrease, preventing the engine from receiving proper lubrication, leading to abnormal wear. 2. Metal debris cleaned by the oil cannot be expelled and will accumulate inside the engine, causing dirt to form a large amount of sludge. 3. The engine may also experience increased fuel consumption, reduced power, difficulty starting, abnormal shaking, and poor operation. Below are the functions of engine oil: 1. Lubrication: There are many moving friction surfaces inside the engine (e.g., piston and cylinder, crankshaft and crankshaft bearing, valve and valve guide, etc.). The role of engine oil is to establish an oil film between these friction surfaces to achieve lubrication and anti-wear effects. 2. Cleaning: The movement of engine components causes wear and produces metal debris. Engine oil continuously circulates inside the engine through the action of the oil pump and carries these metal debris back to the oil pan. 3. Cooling: The continuous circulation of engine oil inside the engine can carry away the heat generated by the engine and cool it through the oil cooler. (The cooling effect of engine oil is only auxiliary.) 4. Sealing: The oil film formed by engine oil on the surface of the engine cylinder wall and the inner surface of the valve guide can provide a sealing and leak-proof effect.
