Check your oil with the dipstick while the engine is cold and parked on level ground
Engine oil keeps your engine lubricated and running smoothly. Over time, the oil level drops as the engine burns some of it and as small amounts leak out. Checking your oil takes about five minutes and tells you whether you need to add more before it gets low enough to damage the engine.
The process is straightforward: locate the dipstick under the hood, pull it out, wipe it clean, reinsert it fully, pull it out again, and read where the oil level sits on the marked end. You do not need special tools or training. Most people can learn to do this in one try.
Key Takeaways
- Check your oil when the engine is completely cold and the car is parked on flat ground, ideally in the morning before you drive.
- The dipstick has two marks — minimum and maximum — and your oil should sit between them, closer to maximum.
- If the oil is below the minimum line, add the type of oil your owner's manual specifies, usually a quart at a time.
- Checking oil every month or before long trips takes two minutes and can prevent engine damage that costs thousands to repair.
Locate the dipstick under your hood
Open your hood and look for a handle sticking up from the engine. The handle is usually yellow, orange, or red, and it has a ring or loop you can grip. This is the dipstick. If you cannot spot it, check your owner's manual — it will show you exactly where it sits in your engine bay and may include a diagram.
On some newer vehicles, the dipstick is harder to reach or located in an unexpected spot. Hybrid and electric vehicles sometimes do not have a traditional dipstick at all; instead, they use an electronic oil level sensor that displays the reading on your dashboard. Check your manual if you do not see a handle within the first few seconds of looking.
Pull the dipstick out and wipe it clean
Grip the handle firmly and pull straight up. The dipstick will slide out of its tube. You will see oil on the end of it — this is normal. Grab a clean paper towel, cloth, or old rag and wipe the oil completely off the dipstick so you can see the markings clearly.
Do not worry about getting your hands dirty. Engine oil washes off with soap and water. If you want to avoid the mess, wear disposable gloves or keep a rag nearby before you start.
Reinsert the dipstick fully, then pull it out to read the level
Push the dipstick back into its tube until it stops. You will feel it seat at the bottom. This step matters because it ensures the reading is accurate — if you do not push it all the way in, the oil level will appear lower than it actually is.
Now pull it out again slowly and look at the end. You will see two marks: one labeled "minimum" or "low" and one labeled "maximum" or "full." The oil on the dipstick will reach somewhere between these two marks, or possibly above or below them. Where it reaches tells you the oil level.
Understand what the oil level means
If the oil reaches the maximum line or slightly below it, your oil level is healthy. You do not need to add oil. If the oil is between the minimum and maximum lines, your level is acceptable, though you may want to add oil soon depending on how close it is to the minimum.
If the oil is below the minimum line or there is barely any oil on the dipstick at all, you need to add oil before driving the car. Driving with oil below the minimum line can damage the engine over time. If the dipstick shows no oil at all, do not drive the car — check for a leak or have a mechanic look at it before you operate the vehicle.
Add oil if the level is low
If you need to add oil, open your owner's manual or look under the hood for a cap labeled "oil" or showing an oil can symbol. This cap is usually on top of the engine and is straightforward to remove by hand or with a quarter-turn. Unscrew it and set it aside where you will not lose it.
Pour the correct type of oil into the opening. Your owner's manual specifies the type — it will say something like "5W-30" or "10W-40." Use that exact type. Add about half a quart, wait a minute, then check the dipstick again using the same process. Add more oil in small amounts until the level reaches between the minimum and maximum marks. Screw the cap back on tightly when you are done.
Know when to check your oil and what to watch for
Check your oil once a month or before any long road trip. Many people check it when they fill up with gas, since they are already at the car. If you notice the oil level dropping quickly — needing a quart or more every few hundred miles — you may have a leak or an engine problem. Have a mechanic inspect it rather than just adding oil repeatedly.
Also watch for the oil warning light on your dashboard. It looks like an oil can and lights up when the oil pressure drops dangerously low. If it comes on while you are driving, pull over safely, turn off the engine, and check the dipstick. If the level is low, add oil. If the light stays on after you add oil, do not drive the car — have it towed to a mechanic.
Frequently Asked Questions
Can I check my oil when the engine is hot?
You can, but the reading will be less accurate. Hot oil expands and sits higher on the dipstick than it actually does when cold. For the most reliable reading, check the oil in the morning before you drive, or wait at least five minutes after turning off the engine if you must check it while warm.
What if the dipstick is stuck or hard to pull?
Wiggle it gently side to side while pulling up — do not yank hard, as you could break it. If it still will not budge, the tube may be bent or the dipstick may be stuck from old oil buildup. Stop and have a mechanic look at it rather than forcing it.
Do I need to check the oil if my car is brand new?
New cars rarely need oil added between services, but it is still worth checking once a month to catch any unexpected leaks early. As the car ages, checking becomes more important because oil consumption increases over time.
What type of oil should I buy if I need to add some?
Always use the type listed in your owner's manual. It will specify the viscosity — the "W" number — and sometimes the brand. Using the wrong type can affect how your engine runs and may void your warranty. If you have lost your manual, the correct oil type is often printed on the inside of the fuel door or on a sticker under the hood.
Is it normal for oil to get darker over time?
Yes. Oil darkens as it circulates through the engine and collects tiny particles. Dark oil is not a sign that you need to change it — that depends on your oil change schedule, which your manual specifies. The color tells you nothing about whether the level is correct.