What are the effects of adding too much engine oil?

[KinsleyAnn]

The effects of adding too much engine oil include: 1. Intense agitation between engine components, leading to excessive engine load and power loss; 2. Splashing onto the cylinder walls and entering the intake system through the crankcase ventilation system, causing oil burning issues. Solutions for overfilling engine oil are: 1. Removing the oil drain plug to drain excess oil; 2. Using an oil pump to extract the excess. Engine oil, also known as engine lubricant, serves multiple functions such as lubrication and wear reduction, auxiliary cooling, sealing and leak prevention, rust and corrosion protection, as well as shock absorption. Engine oil consists of base oil and additives. The base oil is the primary component of lubricants, determining their fundamental properties, while additives compensate for and improve the shortcomings of the base oil, providing certain new characteristics, making them an essential part of lubricants.

[DelTessa]

Last time my car was being serviced, engine oil was accidentally overfilled. After starting, the car clearly didn't feel right - acceleration felt like dragging a heavy load, and fuel consumption skyrocketed. Checking the dipstick showed the level was way above the maximum line. The mechanic warned that excess oil increases crankcase pressure, which can blow out seals and cause leaks. Even worse, the churning oil turns foamy during operation, drastically reducing lubrication effectiveness. This increases piston friction and accelerates long-term wear, potentially leading to repairs costing thousands. Now I always measure carefully when adding oil - parking on level ground and waiting several minutes before checking the dipstick. The key is following the manual's recommended quantity: too little is insufficient, but overfilling can damage the engine. During regular maintenance, I have technicians use extraction pumps for precise control to minimize such risks. Ultimately, maintaining the proper level is safest - otherwise premature engine failure could mean major financial loss.

[MacLevi]

I often help friends with vehicle issues, and overfilling engine oil is a common oversight. Excess oil in the crankcase increases the rotational resistance of the crankshaft significantly—this is no minor issue. It converts into additional heat, causing the oil temperature to rise too quickly and accelerating the aging and damage of seals. I've also encountered cases where oil foams at high speeds, leading to incomplete lubrication films, increased friction between parts, and accelerated wear. This not only affects fuel consumption but may also cause sudden failures. For example, increased oil pressure can lead to leaks that contaminate components or even cause localized overheating and seizure. Prevention is simple: always use the dipstick to check oil levels after each change, ensuring it's between the min and max marks. Start the engine and let it run for a few minutes before rechecking. Pay attention to any unusual noises or vibrations while driving—early detection and correction save both money and hassle.

[Jones]

Once I was in a hurry when changing the engine oil and added a bit too much. As a result, the car felt sluggish, and the engine emitted some smoke. When I took it to the repair shop, they said the oil level was excessive, causing high crankshaft pressure that damaged the oil seals, leading to severe oil leakage. More critically, the foamy oil provided insufficient lubrication, increasing piston friction, raising fuel consumption, and potentially causing the car to stall suddenly. Now, I check the oil level more frequently with the dipstick, ensuring the car is stationary and the oil has settled before measuring. Keeping the oil level at the midpoint is safest to avoid overfilling.