How to Check Your Engine Oil (and Add More)

Difficulty: Beginner Time: 2–5 minutes

Running low on oil is one of the fastest ways to damage an engine, and many cars burn or leak a little between oil changes. Checking it takes about two minutes and needs nothing but a paper towel.

Check it about once a month, before long trips, and any time you see an oil leak or the oil light. Some newer cars have no dipstick and show the oil level on the dashboard instead; your owner’s manual will say.

What you'll need

Step by step

1. 1

   Park on level ground

   Park on a flat surface. If the engine was running, turn it off and wait about 5 to 10 minutes so the oil drains back into the pan for an accurate reading.

2. 2

   Find the dipstick

   Open the hood and look for a handle, often yellow or orange, with an oil can symbol. Do not confuse it with the transmission dipstick, which some cars also have.

3. 3

   Pull it out and wipe it clean

   Pull the dipstick all the way out and wipe the end clean with a paper towel.

4. 4

   Push it back in and pull it out again

   Push it all the way back in, wait a second, then pull it out again. This second pull gives the real reading.

5. 5

   Read the level

   The end has two marks (dots, holes, lines, or MIN/MAX). The oil should be between them, ideally near the top mark.

6. 6

   Look at the color

   Fresh oil is amber; used oil gets darker. Milky or foamy oil can mean coolant is mixing in and needs a mechanic. Gritty oil means it is overdue for a change.

7. 7

   Add oil if it is low

   Remove the oil fill cap on top of the engine (marked with an oil can). Add about half a quart at a time with a funnel, wait a minute, and re-check. Do not overfill.

8. 8

   Put everything back

   Push the dipstick fully in and screw the fill cap on tight.

Tips

• The space between the two marks is usually about one quart, so if it reads at the bottom mark, about a quart brings it to full.
• If you need to add oil often, the engine may be leaking or burning oil. Keep track of how much and how often.
• Use the oil grade listed in your owner’s manual or on the oil fill cap.

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Frequently asked questions

Should I check oil hot or cold?

Either works if you wait a few minutes after turning the engine off and park on level ground. Many people find it easiest first thing in the morning before driving.

What happens if I overfill the oil?

Too much oil can foam and cause leaks or engine problems. If you are well above the top mark, have the extra drained.

How often should I check my oil?

About once a month and before long trips. Older cars that use some oil should be checked more often.

What does it mean if the oil is milky?

Milky, light-brown oil can mean coolant is getting into the oil, sometimes from a head gasket. Have it checked before driving much.

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