What Happens If You Don't Change the Engine Oil for 15,000 Kilometers?
2 Answers
Not changing the engine oil for 15,000 kilometers can lead to issues such as oil thinning, reduced lubrication, and diminished cooling effects. The specific problems are as follows: Oil Thinning: High-quality engine oil has viscosity, which effectively seals the gaps between the cylinder block and pistons to prevent gas leakage. If the oil is not changed for a long time, it will thin out and lose its sealing function. Reduced Lubrication: The lubrication system is crucial for the engine, affecting its performance and lifespan. If the oil is not changed for an extended period, its lubrication effectiveness will significantly decrease. Diminished Cooling Effect: Oil has much higher heat absorption and thermal conductivity than water. If the oil deteriorates severely, its cooling function will be greatly compromised.
Last time I drove 15,000 kilometers without changing the engine oil, and my car started having problems. The engine noise became extremely loud, like metal grinding, and it felt sluggish when accelerating, with fuel consumption skyrocketing. Upon inspection, the engine oil was as black as soy sauce, full of sludge, and had almost no lubrication effect left. Over time, severe wear and tear occurred inside the engine, which could lead to major repairs or even a complete engine replacement—costing tens of thousands. My friend’s car ended up like this; when towed to the repair shop, the mechanic said the piston rings and bearings were damaged. Luckily, it wasn’t completely ruined. It’s best to change the oil every 5,000 to 10,000 kilometers and regularly check the dipstick—clear, light-yellow oil is ideal. Remember, neglecting minor maintenance can lead to major troubles. Driving safety comes first!
