What Happens If You Put Too Much Oil in Your Car?

what happens if you put too much oil

what happens if you put too much oil

As a car owner, you have to take care of various maintenance tasks to keep your car in good condition. Among those tasks, changing the engine oil at regular intervals is the most common but essential task.

Not just changing but also maintaining the right oil level in your car’s engine is also very crucial.

While it’s crucial to have sufficient oil, adding too much can lead to various problems.

You should consult your car’s manual to determine the recommended oil capacity.

In this blog, we’ll discuss the dangers of overfilling engine oil and its effects on engine performance.

The Dangers of Overfilling

  • Reduced Engine Efficiency: An excessive oil level can lead to foaming, which decreases the oil’s lubrication properties, resulting in increased friction and reduced engine efficiency.
  • May Cause Leakage: Extra oil can lead to an increase in oil pressure, potentially damaging the oil filter or even causing leaks in the engine through the head gasket.
  • Increased Emissions: Overfilling can lead to oil being burned along with fuel, causing increased emissions and potential harm to the environment.
  • Oil Aeration: Overfilled oil can whip around inside the crankcase, causing air bubbles that further hinder its lubrication abilities.

Effects on Engine Performance

  • Engine Misfire: Overfilling can lead to spark plug fouling, causing misfiring and decreased engine performance.
  • Smoke from Exhaust: An excess of oil in the engine can result in blue or white smoke being emitted from the exhaust.
  • Catalytic Converter Damage: If oil reaches the catalytic converter, it can cause damage and lead to costly repairs.

Potential Damage to Engine Components

  • Damage to the Piston Rings: The extra pressure from overfilling can lead to damage or even breakage of the piston rings.
  • Bearing Damage: Excess oil can cause the crankshaft to strike the oil in the pan, leading to bearing damage.
  • Oil Pan Damage: In extreme cases, overfilled oil can cause the oil pan to crack or rupture due to increased pressure.

How to Fix Overfilled Oil?

  • Drain Excess Oil: If you’ve added too much oil, you must drain the excess carefully. Consult a professional mechanic if unsure about the process.
  • Check for Contamination: After draining, check for any signs of contamination or damage that might have resulted from the overfilling.
  • Monitor Engine Performance: Keep a close eye on your engine’s performance after the oil correction to ensure no lasting damage has occurred.

Preventative Measures

  • Follow Manufacturer Guidelines: Always refer to your car’s manual for the recommended oil type and capacity.
  • Use a Measuring Container: When adding oil, use a measuring container to avoid guesswork and ensure you add the correct amount.
  • Regular Oil Changes: Stick to a consistent oil change schedule to prevent the need to top up oil frequently.


Putting too much oil in your car’s engine can have severe consequences on its performance and longevity. It’s essential to maintain the proper oil level and adhere to the manufacturer’s guidelines to keep your engine running smoothly.

Timely oil changes, regular service at reliable workshops like Automovill, and a proactive approach will help you avoid the risks associated with overfilling and ensure your car stays in top-notch condition for years to come.

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