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What happens if I overfill my engine oil?
Yesterday I decided to top off my engine oil levels as I suspected my oil was low, and I didn’t have time to bring my car in for an oil change. I haven’t driven it much since but I’m worried that I could damage my engine from overfilling it. Do you know what could happen if I overfill my engine oil?
Katherine Duffy · Updated on
Reviewed by Shannon Martin, Licensed Insurance Agent.
I’m sorry to hear about your engine oil troubles! If you overfill your engine oil, you could potentially damage your engine.
While engine oil is essential to keeping your engine healthy and efficient, too much can cause problems. Here’s what could happen if you overfill your engine oil:
- Too much pressure on crankshaft: Your crankshaft head and tails prevent leaking, but when there’s too much engine oil, pressure is applied to this important engine part, which can cause leaks. If this leak occurs close to the flywheel, the oil leak can even damage the clutch.
- Crankshaft friction: The crankshaft can become coated in oil which actually causes more friction and resistance. This will damage your crankshaft.
- Engine wear and tear: An oil overfill can result in improper oil pressure in your engine, which means that your engine parts won’t be lubricated properly, causing wear and tear on your engine parts.
You might notice you’ve overfilled your engine if engine oil is pooling on the ground when your car is parked or if your hood starts smoking a thick gray or blue smoke.
Ensuring your engine oil is properly filled is a great way to keep yourself and your car protected, but the best way to make sure you’re covered is by signing up for great
car insurance
coverage at an affordable rate. Jerry
can help!It’s this simple: download the Jerry app or go to getjerry.com. In less than 45 seconds, Jerry collects all of your information from your existing insurer. Choose from competitive quotes from top insurance companies, and Jerry takes care of the rest—securing your new policy and helping you cancel your old one upon request.
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- Gregory R.
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Jerry partners with more than 50 insurance companies, but our content is independently researched, written, and fact-checked by our team of editors and agents. We aren’t paid for reviews or other content.
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