What are the effects of overfilling engine oil in a truck?
2 Answers
The following are the effects of overfilling engine oil in a truck: 1. Reduced engine power output: Excessive engine oil can reduce the engine's power output. When the engine is running, the crankshaft and connecting rod big end move rapidly. If there is too much oil, the crankshaft and connecting rod will cause intense agitation. Agitating the oil consumes a certain amount of energy, which indirectly leads to a reduction in engine power output and also increases fuel consumption. 2. Excessive engine oil can cause blue smoke from the exhaust pipe: Too much oil will inevitably lead to oil splashing due to the rapid movement of the crankshaft and connecting rod big end. A large amount of splashed oil can enter the combustion chamber and burn, resulting in blue smoke from the exhaust pipe, also known as "oil burning," which is a method to determine excessive fuel consumption.
Let me make this clear. I've seen too many drivers thinking that adding extra engine oil is safer, only to end up damaging their engines. The biggest problem with too much oil is that the crankshaft will whip the oil as it rotates, churning it into foam—like whisking eggs. Once this foam enters the lubrication system, it's game over. Oil pressure fluctuates wildly, and precision components like bearings lose their stable oil film protection, leading to instant scoring. Even worse, the engine's running resistance increases, making it feel like dragging your feet—fuel consumption spikes while power drops. I once worked on a car spewing blue smoke; when we opened it up, the valve stem seals were all blown out. The repair cost was enough to buy two years' worth of oil. Remember, the safest level is between the middle and upper marks on the dipstick. If it's over, drain the excess immediately.
