Too Much Oil in Your Car's Engine: Risks and How to Fix It

by AutoExpert   |  22 August, 2024

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Ever topped off your car's engine oil and wondered if you might have added a bit too much? Sure, we often hear warnings about not letting the oil dip too low, but overdoing it can actually stir up trouble under the hood too.

When More Isn’t Merrier

Imagine the engine as the heart of your car, with every part designed to work in near-perfect harmony. Now, these parts need just the right amount of oil—no more, no less. So, what happens if you get a little heavy-handed with the oil can? Let’s say it’s not going to make your engine any happier.

Too Much Oil

Checking the Oil: Not Just a Tick Box Exercise

Here’s a quick tip on checking your oil: Warm up your car, shut it down, and give it about 15 minutes to chill. This wait lets the oil settle back down where it belongs, giving you a clear read on what’s really going on in there.

Why Precision Matters with Engine Oil

Your engine's insides are pretty finely tuned. Tiny clearances mean there's no room for error. Any extra gunk, like dirt or debris—or in this case, too much oil—can throw a wrench in the works. And since many engines now are made of aluminum, they're especially vulnerable. They love to keep cool but can get dinged up easier than the old steel ones.

Too Much Oil

The Troubles of Too Much

Overfill your oil, and the excess can whip up into a foamy froth. Not only does this look less appealing than your favorite cappuccino, but it also does a lousy job at keeping things smooth inside. Components wear out faster, and you might even see your trusty oil pump throw in the towel—ouch.

What’s That Light on My Dashboard? Yep, that could be your engine complaining about the oil overload. Too much of it makes it tough for the engine to keep up its rhythm, possibly leading to a lit-up check engine light and even misfires. Not exactly what you want when you’re about to hit the road.

Too Much Oil

Leaks and Pressure Spikes: The Slippery Slope of Too Much Oil Packing your engine with extra oil cranks up the internal pressure, which might sound good to some, but it’s actually a fast track to leak city. Seals can give way, and before you know it, you’ve got oil spots marking your usual parking spot.

Got Too Much Oil? Let’s Fix That

If you peek at the dipstick and the oil’s riding high, here’s how to fix it:

  1. Get your car on a flat spot and pop open the hood.
  2. Pull out the dipstick, give it a wipe, and slide it back in for a double-check.
  3. If it’s clear you’ve overdone it, either let some out from the bottom by loosening the drain plug just a touch, or get fancy with a syringe and hose to suck some out through the dipstick tube.

Too Much Oil

Keeping It Balanced

Going overboard with engine oil is an easy mistake but keep it within the safe marks to avoid turning your engine into a high-drama zone. Just right means a smooth-running engine that lasts longer and performs better. Remember, in the world of engine oil, balance is key—too little or too much, and your car won’t be shy about letting you know.

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