Check your oil with the dipstick while the engine is cold and parked on level ground
The most reliable way to check your oil is to pull the dipstick, wipe it clean, reinsert it fully, then pull it out again and read the level against the marked lines. You need the engine off and cool — ideally before you drive, or at least five minutes after you turn it off — because hot oil gives a false reading. Park on flat ground so the oil settles evenly in the pan. The whole process takes about two minutes and tells you whether you need to add oil before your next scheduled oil change.
Most cars have a dipstick under the hood with a yellow or orange handle. Some newer vehicles have an electronic oil-level display on the dashboard instead of a physical dipstick; check your owner's manual to confirm which your car uses. If you have a dipstick, you will see two marks or a crosshatched zone on it — one for minimum and one for maximum. Oil between those marks is normal. Below minimum means you should add oil; above maximum means you have overfilled, which can damage the engine.
Key Takeaways
- Always check oil when the engine is cold and the car is parked on level ground, because hot oil and tilted ground both give false readings.
- Pull the dipstick all the way out, wipe it completely clean on a rag or paper towel, push it back in fully, then pull it out again to read the true level.
- Oil between the minimum and maximum marks is normal; below minimum means add oil, above maximum means you have overfilled.
- If you add oil, use the grade and type listed in your owner's manual, pour slowly, and recheck the level after a minute to avoid overfilling.
Locate the dipstick under the hood
Open your hood and look for a handle sticking up from the engine block. The handle is usually bright yellow, orange, or red and has a loop you can grip with your fingers. On most cars it is on the driver's side of the engine, but some models place it on the passenger side or toward the back. If you cannot find it, check your owner's manual for the exact location — the manual has a diagram of the engine bay with all components labeled.
Once you spot the handle, grasp it firmly and pull straight up with steady pressure. The dipstick is attached to a tube that goes down into the oil pan, so it may take a little force to break it free. Do not twist or wiggle it side to side; pull straight up. If it resists, wiggle it gently while pulling, but do not force it so hard that you bend the handle.
Wipe the dipstick clean before reading it
When you pull the dipstick out, oil will coat the lower half. You cannot read the true level through the oil film, so you must wipe it completely clean. Use a rag, paper towel, or old cloth — anything that will not shed lint. Wipe from the handle end down to the tip, removing all the oil. If the first wipe leaves streaks, wipe again until the stick is dry.
This step is critical because oil left on the stick will make the level appear higher than it actually is. A reader who skips this step and reinserts a dirty stick will get a false high reading and may not add oil when the car actually needs it.
Reinsert the dipstick fully, then pull it out to read the level
Push the clean dipstick back into the tube until it seats completely. You will feel it stop when it reaches the bottom of the tube. Do not force it past that point. Wait a second or two for the oil to settle on the stick, then pull it straight out again. This second pull is the one you read — the oil will have coated the stick to show the true level in the pan.
Look at where the oil ends on the stick. Most dipsticks have two marks: a lower line for minimum and an upper line for maximum. Some have a crosshatched zone instead of lines. If the oil reaches the upper mark or is within the zone, your level is normal. If it is below the lower mark, you need to add oil. If it is above the upper mark, you have overfilled and should not add more.
Add oil if the level is below the minimum mark
If the dipstick shows oil below the minimum line, you need to add oil before driving. Check your owner's manual for the correct oil grade and type — it will list something like "5W-30" or "10W-40." Use only that grade; using the wrong type can affect engine performance and fuel economy. Buy a quart of the correct oil from any auto parts store or gas station.
Locate the oil filler cap on top of the engine — it usually has an oil can symbol printed on it. Twist it counterclockwise to remove it. Pour the oil slowly into the opening, watching the level as you go. Add about half a quart, wait a minute for it to drain into the pan, then check the dipstick again using the same wipe-and-reinsert method. Add more oil in small amounts until the level reaches the maximum mark. Screw the cap back on when you are done.
Do not overfill. Oil above the maximum mark can foam inside the engine, reduce lubrication, and cause damage. If you accidentally overfill, you can remove excess oil by loosening the drain plug slightly and letting a small amount drain into a pan, but it is easier to avoid overfilling by adding slowly and checking often.
Check your oil every month or before long drives
Oil level changes between scheduled oil changes because the engine burns some oil during normal operation. How much varies by engine age, driving habits, and engine condition. A newer engine in good shape may burn almost none; an older engine or one with high mileage may burn a quart every few hundred miles. Checking monthly — or before a long road trip — catches a low level before it damages the engine.
If you find that you are adding oil every few weeks, or if the level drops more than a quart between oil changes, the engine may have a leak or be burning oil abnormally. This is worth mentioning to a mechanic at your next service, because a small problem caught early is cheaper to fix than engine damage from running low on oil.
Frequently Asked Questions
Can I check the oil while the engine is warm or hot?
You can, but the reading will be inaccurate. Hot oil expands and sits higher on the dipstick than it actually does in the pan. Wait at least five minutes after turning off the engine, or check before you start driving. Cold readings are always more reliable.
What if my car has an electronic oil display instead of a dipstick?
Some newer cars show oil level on the dashboard or infotainment screen instead of a physical dipstick. Check your owner's manual to see how to access the reading. The process is the same — you are looking for whether the level is normal, low, or high — but you do not need to pull anything from under the hood.
Is it normal for oil level to drop between oil changes?
Yes. Engines burn some oil during normal operation, so the level will be lower at your next oil change than it was right after the last one. If it drops more than a quart between changes, or if you are adding oil every few weeks, mention it to your mechanic.
What happens if I drive with oil below the minimum mark?
Driving on low oil reduces lubrication and can cause engine damage, especially if you drive hard or at high speeds. Add oil as soon as you notice the level is low. If you have already driven on low oil, have a mechanic check the engine for damage.
Can I use a different oil grade than what the manual says?
No. Your owner's manual specifies the grade your engine needs for proper lubrication and performance. Using a thicker or thinner oil can reduce fuel economy, increase wear, or cause engine damage. Always use the exact grade listed.