Check your oil with the dipstick while the engine is cold and parked on level ground
The fastest way to check your oil is to pull out the dipstick, wipe it clean, reinsert it fully, then pull it out again and read the level against the markings. This takes about two minutes and tells you whether your oil is low enough to need topping up before your next drive. You do this with the engine off and the car sitting on flat pavement — not on a slope or right after driving, when the oil is hot and the reading will be inaccurate.
Most cars have an oil dipstick under the hood. Some newer vehicles (mainly luxury brands) skip the dipstick entirely and show oil level on the dashboard instead. If you do not see a dipstick when you open the hood, check your owner's manual or the car's information screen to see whether your model has one.
Key Takeaways
- Park on level ground and wait at least five minutes after driving before checking, so the oil settles and gives an accurate reading.
- The dipstick has two marks — minimum and maximum — and your oil should sit between them, closer to maximum.
- If the level is at or below the minimum mark, buy the correct oil type for your car and pour it in through the oil filler cap on top of the engine.
- Checking oil every month or before long trips takes 30 seconds and can prevent engine damage from running dry.
Locating the dipstick under your hood
Open your hood and look for a handle or loop sticking up from the engine. The handle is usually yellow, orange, or red, and it has a long thin metal rod attached. That rod is the dipstick. If you cannot spot it when ready, trace around the sides and back of the engine block — the dipstick is almost always mounted on the outside edge rather than in the middle.
If you still cannot find it, your owner's manual will show you exactly where it is. You can also search your car's year, make, and model online along with "dipstick location" and find photos from other owners. Once you know where it is the first time, you will find it in seconds on every check after that.
The correct way to read the dipstick
Grasp the handle firmly and pull straight up. The dipstick will slide out of its tube. You will see oil coating the bottom portion of the rod. Grab a clean rag or paper towel and wipe the oil off completely — you need to see the bare metal to read the level accurately on the second insertion.
Reinsert the dipstick all the way down into its tube until it seats fully. You should feel a slight resistance as it goes in. Then pull it straight out again. This time, look at where the oil ends on the rod. Most dipsticks have two marks: a minimum line (often labeled "MIN" or shown as a small notch) and a maximum line (often labeled "MAX" or "FULL"). Your oil should be between these two marks, and ideally closer to the maximum line.
If the oil barely reaches the minimum line or falls below it, your engine is low on oil and needs topping up before you drive far. If the oil is above the maximum line, you have too much oil in the engine, which can cause problems — in that case, you may need to have some drained out, though this is less common.
What to do if your oil is low
If the dipstick shows oil below the minimum mark, you need to add oil. First, find out what type your car needs. Check your owner's manual or look for a label on the oil filler cap (the large cap on top of the engine, usually labeled "OIL"). The label will show the oil grade — something like "5W-30" or "10W-40" — and possibly the volume your engine holds.
Buy a quart of that oil from any auto parts store, gas station, or supermarket. Do not mix brands or types — stick with what your manual specifies. Unscrew the oil filler cap and set it aside where you will not lose it. Slowly pour the oil in. Add about half a quart, wait a minute for it to drain down 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 between the minimum and maximum marks.
Screw the oil filler cap back on tightly. You do not need to drive anywhere or run the engine — the oil is already in the system and working. Check the level again in a week or two to make sure it is not dropping quickly, which could signal a leak.
When to check your oil and how often
Check your oil at least once a month, and always before a long road trip. Many people check it when they fill up with gas, since they are at the station anyway. If your car is older, has high mileage, or burns oil noticeably, check it every two weeks or before any drive over 100 miles.
Always check with the engine off and cold. If you have just driven, wait at least five minutes — the oil circulates through the engine when it is running and will coat the dipstick higher than the true level. Checking a hot engine gives a false reading and can lead you to overfill.
Why checking oil matters for your engine
Oil lubricates every moving part inside your engine. Without enough of it, metal rubs on metal, heat builds up, and parts wear out or seize. Catching a low oil level before it becomes a problem is one of the cheapest ways to protect your engine. A quart of oil costs a few dollars. An engine that has run dry costs thousands to repair or replace.
Low oil often means you have a slow leak somewhere in the engine or its seals. If you are adding oil every week or two, that is a sign to have a mechanic look for the source. But in the meantime, keeping the level topped up keeps your engine running safely.
Frequently Asked Questions
Can I check my oil right after I drive the car?
No — wait at least five minutes after turning off the engine. When the engine runs, oil circulates and coats the dipstick higher than the true level sitting in the pan. A hot-engine reading will tell you the oil is higher than it actually is, and you might skip topping up when you should.
What if I cannot find the minimum and maximum marks on my dipstick?
Some dipsticks use a crosshatch pattern or dots instead of lines. The lower crosshatch or dot is minimum, the upper one is maximum. If the dipstick is worn or unclear, you can buy a replacement dipstick for your car model at an auto parts store for under $20, or ask a mechanic to read it for you.
Is it normal for oil level to drop between checks?
A small drop over a month is normal — engines burn a small amount of oil during operation. If you are losing more than a quart every 1,000 miles, or if the level drops noticeably in just a week or two, you may have a leak or burning issue that a mechanic should inspect.
What happens if I overfill the oil?
Too much oil can foam inside the engine, reducing its ability to lubricate, and can leak out of seals. If you accidentally overfill, do not drive. Either remove the excess yourself by loosening the drain plug slightly and letting oil drip into a pan, or take the car to a mechanic to drain it properly.