Check your oil with the engine off and parked on level ground

The fastest way to check engine oil is to turn off your engine, wait two to three minutes for the oil to settle, then pull out the dipstick, wipe it clean, reinsert it fully, and read where the oil level sits. You need the engine off because oil is still moving through the engine while it runs, and you need level ground because a tilted car gives a false reading. The whole process takes about five minutes and tells you whether you need to add oil before your next drive.

Most cars have an oil dipstick under the hood — a long thin rod with markings at the bottom. Some newer vehicles have an electronic oil monitor on the dashboard instead, which you can read without opening the hood. If your car has a dipstick, you can check it yourself. If it has only an electronic display, you read the number there, but you still cannot add oil yourself without a dipstick or filler cap.

Key Takeaways

  • Park on level ground and wait two to three minutes after turning off the engine so the oil settles and gives an accurate reading.
  • The dipstick has a minimum and maximum mark — oil should sit between them, closer to the maximum line.
  • If the level is below the minimum mark, buy the correct oil type for your car and add it slowly, checking the level after each pour.
  • Check your oil every month or before long drives, and after any work done to the engine.
  • If the oil is dark brown or black instead of amber or light brown, it may be time for an oil change, but checking the level is separate from checking the condition.

Locate the dipstick under your hood

Open the hood and look for a rod with a yellow or orange handle, usually near the front or side of the engine. The handle is often labeled "Oil" or has an oil-can symbol. Pull the handle straight up and out — it should slide out easily. If you cannot find it, check your owner's manual for the exact location in your model.

Some dipsticks are harder to reach than others depending on the engine layout. If the handle is stuck, do not force it — wiggle it gently side to side while pulling up. Once it is out, you will see a long thin rod with markings near the bottom.

Wipe the dipstick and reinsert it fully

Use a clean paper towel or rag to wipe all the oil off the dipstick. This removes the old reading so you can see the new one clearly. Wipe from the handle end toward the tip, using a fresh section of the towel as you go.

Once the dipstick is clean and dry, push it back into the tube until it sits all the way down. You should feel a slight resistance as it seats — do not force it, but make sure it is fully inserted. A dipstick that is only halfway in will give a false high reading.

Read the oil level between the minimum and maximum marks

Pull the dipstick out again and look at the bottom section where the markings are. You will see two lines or notches — one marked "Min" or "Low" and one marked "Max" or "Full." The oil will have coated the rod up to a certain point. That point is your current oil level.

The oil should sit at or near the maximum line. If it is between the minimum and maximum, your oil level is acceptable. If it is below the minimum line, you need to add oil. If it is above the maximum line, you have too much oil and should have some removed — this is rare and usually only happens if someone overfilled it.

Add oil if the level is below the minimum mark

If the dipstick shows the oil is low, you will need to add more. First, find out what type of oil your car needs — check the owner's manual or look for a label on the oil filler cap under the hood. The cap usually says something like "5W-30" or "10W-40." Buy a quart of that exact type from any auto parts store or gas station.

Unscrew the oil filler cap by turning it counterclockwise. Pour about half a quart into the opening, then wait a minute for it to drain down into the pan. Reinsert the dipstick, wipe it clean, reinsert it fully, and check the level again. If it is still low, add a bit more and check again. Stop when the level reaches the maximum mark. Screw the cap back on tightly.

Do not overfill — oil that is too high can damage the engine. If you accidentally add too much, you will need to have some removed, which usually requires a visit to a mechanic or quick-lube shop.

Check your oil on a regular schedule

Most cars built in the last ten years can go 5,000 to 10,000 miles between oil changes, depending on the engine and the type of oil used. During that time, the oil level can drop slightly as the engine burns some of it. Check the level once a month, or before any long drive over 500 miles.

You should also check the oil after any work is done to the engine, or if you notice the check-engine light on your dashboard. A sudden drop in oil level between checks can mean a leak, which a mechanic should inspect.

Understand the difference between oil level and oil condition

Checking the level tells you whether you have enough oil. Checking the condition tells you whether that oil is still doing its job. When you wipe the dipstick, look at the color of the oil on the rag. Fresh oil is amber or light brown. Oil that is dark brown or black has been in the engine longer and may be due for a change.

Your owner's manual will tell you how often to change the oil — usually every 5,000 to 10,000 miles, or every six months, whichever comes first. Some newer cars have an oil-change reminder light that tells you when it is time. The level check and the condition check are separate — you can have a full tank of dirty oil, or a low tank of clean oil.

Frequently Asked Questions

Can I check the oil while the engine is still warm?

You can, but wait at least two to three minutes after turning it off. The oil is still circulating while the engine runs, so the dipstick will read high. Waiting lets the oil drain back into the pan and settle, giving you an accurate reading. If you check when ready after driving, add a quart to account for the warm-oil reading.

What if I cannot find the dipstick?

Some cars made after 2010 do not have a traditional dipstick — they have an electronic oil-level monitor on the dashboard instead. Check your owner's manual to see which your car has. If it has only an electronic display, you cannot add oil yourself without a dipstick or access to the oil filler cap, so you will need a mechanic to top it off.

How much does it cost to add oil?

A quart of oil costs between three and eight dollars depending on the type and brand. If you add it yourself, that is your only cost. If you have a mechanic add it, they may charge a small service fee, usually five to fifteen dollars, though many quick-lube shops do it free if you buy the oil from them.

What happens if I drive with low oil?

Driving with oil below the minimum mark can cause the engine to overheat and wear faster, but it will not damage the engine when ready. If you notice the level is low, add oil before your next long drive. If the oil light on your dashboard comes on while you are driving, pull over safely and turn off the engine — do not keep driving, as this means the oil pressure is too low.

Can I check the oil on a cold engine?

Yes, checking on a cold engine is actually fine and gives an accurate reading. The only time you need to wait is if you have just driven the car — then you wait for the oil to settle. If the car has been parked overnight or for several hours, the oil is already settled and you can check it right away.