What Are the Hazards of Excessive Engine Oil?
2 Answers
The hazards of overfilling engine oil: It can cause the engine speed to rise very slowly during acceleration and may also damage the three-way catalytic converter. Below are some tips for adding engine oil: 1. When adding engine oil, it should be filled between the min and max marks on the dipstick. The oil level should not be below the min mark or above the max mark. If overfilled, some oil can be drained or extracted. 2. Engine oil is known as the lifeblood of the engine. It serves to lubricate, cool, clean, and seal within the engine. Without sufficient oil, the engine cannot operate properly. If the oil level is too low, some parts of the engine may not receive adequate lubrication, leading to increased wear. 3. 99% of engine wear occurs during cold starts. During a cold start, the oil has not yet reached the surfaces of the components that need lubrication, resulting in dry friction and the most severe engine wear. Once the engine starts, the oil pump begins normal operation, and the oil quickly reaches the surfaces of the components needing lubrication, forming a protective film, thereby reducing engine wear.
Too much engine oil is not a good thing. When I first bought my car, I accidentally overfilled it with oil, and while driving, I noticed the engine sounded strange and had noticeable vibrations. After consulting an experienced driver, I learned that overfilled oil causes the crankshaft to vigorously churn the oil during rotation, creating bubbles. These foam bubbles reduce lubrication effectiveness, increase friction between parts, accelerate wear, and shorten the engine's lifespan. Even worse, excessive internal pressure can cause seal rings to rupture and leak oil. If oil leaks onto the engine surface, it may even pose a fire risk. Back then, I promptly stopped to check and replaced the seal ring, avoiding more severe damage. Now, every quarter, I pull out the dipstick myself to check the oil level, ensuring it stays between the maximum and minimum marks to avoid repeating the mistake. Driving details matter—don’t overlook these small things. A well-maintained car lasts longer.
