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(Updated May 2026: Refreshed oil leak safety tips, added clearer fluid-identification advice, and updated the common places to check for engine oil leaks.)
There’s nothing worse than seeing that psychedelically colored puddle under your car after pulling out of your parking spot. When your car is leaking oil, there are a lot of possible causes, and the source is not always obvious right away.
In this guide, we’ll review 7 places to check for an oil leak and know the answer to the question of how to find out where the oil leak is coming from.
Quick Answer: How Do You Find Where an Oil Leak Is Coming From?
Start by confirming the leaking fluid is actually oil. Engine oil is usually amber to dark brown or black, feels slick, and often smells burnt or chemical-like.
Once you know it is oil, check the most common leak spots first: the oil filter, drain plug, oil pan, oil cap, valve cover gasket, other engine gaskets, and signs of a head gasket problem. If the oil is spreading everywhere, clean the area first, drive briefly, then look for the highest fresh wet spot.
A Safety Warning
When there’s oil on the floor, you need to make sure your kids and pets are out of the area. This liquid can make them really sick if it’s ingested.
If you’re going under your car to look for oil, make sure you have protective glasses on and keep your mouth closed. Oil might drip down on your face so you want to be prepared.
Finally, never look around when the car is hot. Don’t go under the car when it’s running. Make sure it’s in “park” with the handbrake on before climbing under the car. These simple tricks will keep you safe during this process.
If you need to lift the car, use proper jack stands on a flat surface. Never rely on a jack alone while you are under the vehicle.
Before Checking for a Leak
Before you start checking for a leak, there are a few things to check. This will ensure it’s actually oil leaking before you start looking for an oil leak. There are some other liquids that could be leaking and tricking you into thinking it’s oil.
Look at the Color
Place cardboard or newspaper under the car to see the color of the liquid. Fresh engine oil is usually amber or light brown, while older oil can look dark brown or black. Bright pink, green, orange, or blue fluid may be coolant or windshield washer fluid instead.
Check the Consistency
Engine oil usually feels slick and slippery between your fingers. Coolant can feel thinner or slightly sticky, while transmission fluid may also feel slick but often has a red or reddish-brown color.
Use Your Nose
Engine oil can smell oily, burnt, or chemical-like. Coolant often has a sweet smell, but avoid touching or smelling unknown fluids too closely.
Check the Level of Your Liquids
Finally, go ahead and check all the levels of your car’s liquids. This applies to your oil, power steering, windshield wiper fluid, and antifreeze.
If one fluid level is dropping faster than normal, that can help point you toward the leak.
7 Common Places to Check for an Oil Leak
After determining that the leak is definitely oil, it’s time to start looking. Put on your trench coat and grab your magnifying glass – it’s time for some detective work.
1. Gaskets
Anywhere there’s a gasket, there’s room for error. A faulty, cracked, chipped, or degrading gasket will cause fluid to leak out. Since oil runs downward, the leak may start higher than where the drip appears on the ground.
This is generally the most commonplace that you’ll find an oil leak. When you shine a flashlight in the area, you’ll find a shiny section of oil. You will also feel it on your fingers if you touch a leaking gasket.
2. Oil Filter
If your oil filter is bad, the oil will drip from it. The filter has a gasket on it and it gets threaded into the underside of your car. If the gasket or threads aren’t properly sealed, the oil will drip from the bottom. This is especially worth checking if the leak started right after an oil change.
Crawling under your car and shining a flashlight on your oil filter will tell you what you need to know. If the filter is covered in oil, you found your suspect.
If the filter is loose, damaged, or leaking from the seal, it may need to be tightened correctly or replaced.
3. Oil Plug
Your oil sits in a big reservoir with a plug at the bottom. When you want to change your oil, you take out the plug and drain the oil.
In most cases, a plug is just a threaded bolt that might have a gasket on it. If your oil plug is damaged or not fully screwed in, that’s probably the culprit.
Get on your back under the car and shine your flashlight up. Find your oil pan and locate the oil plug. Touch it and see if your fingers come back covered in oil. Ensure the plug is fully tightened.
If you just changed your oil and your car is leaking oil, an improperly seated oil plug is probably the culprit.
Do not overtighten the drain plug. If the plug, washer, or oil pan threads are damaged, overtightening can make the problem worse.
4. Oil Pan
While you’re down there, you should also check the oil pan. Your oil pan is made of thin metal that gets bolted to your crankcase with a gasket between the two pieces. Road debris, rust, or bottoming out over a curb can also damage the oil pan.
Look at the rim of the oil pan where it connects to the crankcase. Can you see shiny spots or do you feel oil? Check the bolt holes as well and then look along the body of the pan. If you see oil, trace it with your finger to see if you can feel a crack. Locate the origin of the oil if there’s a trail.
When it comes to the oil pan, there are a few major reasons why it would leak oil:
- The bolts aren’t fully tightened
- The gasket is cracked, deteriorating, or out of position
- There are cracks or holes in the oil pan
- The rim of the oil pan is bent or damaged, causing an improper seal
5. Oil Cap
If the problem is with your oil cap, it’s time to do cartwheels – this is the easiest problem to fix on this list.
Stop your car and pop the hood. Look for your oil cap. It’s a hand-sized plastic piece that says “OIL” on it or has a picture of an old-timey oil can. Can’t find it? Maybe it’s missing. A missing oil cap will cause an oil leak, so getting a new one should fix your problem.
If you find the cap, check to see if it’s fully seated by twisting it clockwise. Otherwise, remove the cap and inspect it. If there are cracks in the plastic or a faulty gasket, it’s time to replace it.
Make sure your oil cap is firmly tightened on your car.
6. Valve Cover
Make sure your car isn’t running and pop the hood. Take a look at the area where you found your oil cap. That big chunk of metal under the cap is your valve cover. It covers your valves (believe it or not).
There’s a gasket that runs along the perimeter of your valve cover, and it’s known for causing issues. Since it’s such a large piece, there’s a lot of room for error.
It’s not rare to have a gasket that isn’t fully seated because it moved a little while the valve cover was installed. Check the rim with your finger after the car cooled down. If you spot oil around the valve cover gasket, the gasket may need to be replaced.
7. Head Gasket
A head gasket leak is more serious than most of the other leaks on this list. It can be hard to confirm visually, but there are warning signs. It sits between the engine block and cylinder head, so a leak here is usually more serious than a simple oil cap or drain plug issue.
This is another part that loves to get twisted, dented, and cut. If you have a bad head gasket, it might be hard to visually find out.
A telltale sign is finding radiator fluid in your oil. Some other signs to look for are milky, white oil, bubbles in the overflow tank for your coolant, and white smoke coming from your exhaust pipe. If you suspect a head gasket issue, it is best to stop driving and get the car inspected.
A bad or blown head gasket should be repaired to stop the oil leak.
Clean the Area and Recheck
Oil can travel across the engine, drip onto other parts, and make the leak look like it is coming from the wrong place.
If you cannot find the source, clean the oily area first, then drive a short distance and check again. Look for the highest fresh wet spot, since oil usually runs downward.
If the leak only shows up while the engine is running, or if oil is spraying instead of dripping, stop driving and have it inspected.
After Finding the Leak
It might seem obvious, but make sure your oil level is corrected after finding and repairing the leak. Who knows how much oil you leaked? Not enough oil in your car will lead to problems that you don’t want.
Check your oil dipstick to see. If you have to replace your oil, don’t forget to correctly seat the oil filter, oil pan, and oil cap.
FAQ
How do I know if the leak is engine oil?
Engine oil is usually amber, brown, or black and feels slick. If the fluid is bright green, pink, orange, or blue, it may be coolant or washer fluid instead.
Can I drive with an oil leak?
It depends on how bad the leak is. A small seep may not be urgent, but a fast drip, low oil level, burning smell, or oil warning light should be treated seriously.
Why is oil leaking after an oil change?
Common causes include a loose oil filter, damaged filter gasket, loose drain plug, missing drain plug washer, or spilled oil that was not cleaned off.
Where do oil leaks usually come from?
Common oil leak spots include the oil filter, drain plug, oil pan gasket, valve cover gasket, oil cap, and other engine gaskets.
Find the Leak Before It Gets Worse
After determining that the leak is truly oil, check these common spots to find the source. Start with the easy areas like the oil cap, oil filter, drain plug, and oil pan before moving to harder-to-reach gaskets.
Don’t forget to be safe during the process. Keep kids and pets away from the fluid, avoid working under a hot or running car, and use proper support if you need to lift the vehicle.
If you can’t find the leak, the oil level keeps dropping, or the leak looks heavy, it might be time to ask a mechanic for help.
