What are the effects of overfilling hybrid engine oil?
2 Answers
Engine oil level should not exceed the maximum mark, as this amount is considered normal. Overfilling engine oil can lead to increased vehicle fuel consumption. Excessive engine oil will affect the normal operation of the crankshaft. It can also increase the vehicle's fuel consumption. Impact point: When the crankshaft journal reaches the bottom dead center, it will strike the engine oil, creating resistance and affecting normal operation, which is not permitted. Additional information: Method for checking engine oil: After adding engine oil, start the vehicle and check the oil level 3 minutes after turning off the engine. This is because when changing the engine oil, the oil filter also needs to be replaced. The new oil filter initially contains no oil, and after starting the vehicle, oil will flow into the filter. Waiting 3 minutes after turning off the engine allows the oil to drain back into the oil pan.
I remember once I absentmindedly overfilled the engine oil, and while driving, the engine felt unusually heavy, as if dragging a bag of bricks. The RPM wouldn't rise, and the throttle response was sluggish. Later, during a check-up, the mechanic explained that overfilling oil increases the crankshaft's rotational resistance, forcing the engine to work harder, naturally reducing power output, and potentially causing smoke emission. Worse, excessive oil pressure could lead to gasket leaks or damage components near the spark plugs, unnecessarily increasing repair costs. Since then, I've always used the dipstick to measure the exact level during oil changes—never overfilling—and avoided mixing different oil brands, as conflicting additives might compromise lubrication. I recommend developing a habit of regularly checking oil levels and promptly draining excess to prevent engine damage and unnecessary expenses.
