What are the consequences of not changing engine oil after exceeding 10,000 kilometers?
4 Answers
If the car is driven for more than 10,000 kilometers without changing the engine oil, it will lead to oil degradation and failure, increased engine wear, and reduced cooling performance. Oil degradation and failure: Prolonged failure to change the oil will cause it to degrade and fail, affecting the engine's heat dissipation and lubrication. In severe cases, it may even clog the oil passages, leading to engine damage or complete failure. Increased engine wear: The accumulation of impurities in the oil increases friction, accelerating engine wear and potentially causing issues like cylinder scoring. Reduced cooling performance: The decline in the oil's cooling function can severely impact certain car components. Over time, some parts may become damaged or even burn out completely. Functions of engine oil: lubrication, auxiliary cooling, rust and corrosion prevention, etc. Engine oil ensures smooth relative sliding between the piston and cylinder, as well as between the crankshaft and bearings, reducing wear between these parts. Since fuel combustion in the engine generates heat, the oil carries heat back to the oil pan during operation, where it dissipates into the air, assisting the radiator in cooling the engine—thereby serving an auxiliary cooling role. Additionally, the oil forms a protective film on parts, shielding them from water, air, acidic substances, and harmful gases.
I have a friend who works as a car mechanic, and he always says that after exceeding 10,000 kilometers, the engine oil deteriorates, its viscosity decreases, and its lubricating effect significantly diminishes. Sludge can form inside the engine, clogging oil passages and increasing friction on components like pistons and bearings, leading to accelerated wear. At this stage, the engine noise becomes louder, acceleration weakens, and fuel consumption rises. In severe cases, it may cause cylinder scoring or bearing seizure, with repair costs starting at several thousand yuan or even leading to complete engine failure. Regular oil changes not only prevent these issues but also help remove contaminants to maintain engine health. Generally, changing the oil every 5,000 to 10,000 kilometers costs a few hundred yuan but can extend the vehicle's lifespan by several years. Never neglect it to save trouble—I've seen too many cars ruin their engines over this small matter. Proper maintenance is the real way to save money.
Having driven for over twenty years, my deepest realization is the severe consequences of not changing engine oil on time. After exceeding 10,000 kilometers, the oil degrades, accumulates carbon deposits, and loses lubrication efficiency, making the engine run roughly as if it's grinding. You'll notice slower acceleration, increased fuel consumption, and even safety hazards, such as overheating and stalling during long highway trips. Once, I neglected an oil change and ended up paying over 3,000 RMB for piston repairs. A reminder to all: engine oil is the lifeblood of your car. Regular changes prevent component wear, oil leaks, and other issues. Maintenance costs are low, but neglecting it leads to greater losses. Keeping your car in good condition ensures peace of mind while driving.
As a car enthusiast, I pay close attention to engine oil condition. Overdue oil changes lead to sludge buildup, impairing heat dissipation and lubrication. Poor engine sealing reduces cylinder pressure, causing sluggish acceleration and possible black smoke or warning lights. Prolonged neglect causes irreversible wear, potentially halving engine lifespan. Oil changes are crucial—never exceed the manual's recommended interval.
