How to Check Your Oil Level (And What the Dipstick Is Telling You)

Your engine oil is what keeps metal parts from grinding against each other at thousands of RPM. Running low on oil — even a little low — accelerates wear and can lead to engine damage that costs thousands to fix. The good news is that checking it takes about two minutes and requires zero tools or experience.

When to Check

Check your oil at least once a month, and always before a long road trip. The best time is when the engine is warm but has been off for 5-10 minutes. This lets the oil drain back into the pan for an accurate reading while keeping it warm enough to flow well on the dipstick.

Note: Some newer cars don't have a physical dipstick — they use an electronic oil level sensor that displays on the dashboard. Check your owner's manual if you can't find a dipstick under the hood.

Step by Step

Step 1: Find the Dipstick

Open the hood and look for a brightly colored handle (usually yellow or orange) sticking up from the engine. It's often near the front of the engine and labeled "OIL" or has an oil can icon. Don't confuse it with the transmission dipstick (if your car has one), which is usually farther back near the firewall.

Step 2: Pull and Wipe

Pull the dipstick out completely. It'll have oil on it, but this initial reading isn't accurate because oil splashes around while driving. Wipe it clean with a paper towel or rag.

Step 3: Reinsert and Pull Again

Push the dipstick all the way back in, then pull it out again. Now look at where the oil line sits relative to the markings on the dipstick.

Step 4: Read the Level

Every dipstick has two marks — a low mark and a high mark (sometimes shown as dots, lines, crosshatching, or "MIN" and "MAX"). The oil should be between these two marks, ideally closer to the high mark.

• Between the marks: You're good. No action needed.
• At or near the low mark: Add oil. The gap between low and high typically represents about one quart.
• Below the low mark: Add oil immediately. Driving with oil below the minimum risks engine damage.
• Above the high mark: Too much oil can cause foaming, which reduces lubrication effectiveness. If it's significantly overfilled, drain some or have a shop correct it.

Step 5: Check the Color and Texture

While you're at it, look at the oil itself:

• Amber/honey colored: Fresh, clean oil. Recently changed.
• Dark brown/black: Normal for oil that's been in service for a while. Not necessarily bad — modern oil gets dark quickly.
• Milky or creamy: Possible coolant contamination. This is serious — have it checked by a mechanic immediately.
• Gritty or metallic particles: Internal engine wear. Also serious. See a mechanic.

Adding Oil

If you need to add oil, you'll need to know the correct type. This is printed on the oil cap (like "5W-30" or "0W-20") and in your owner's manual. Don't mix oil weights unless it's an emergency.

Remove the oil filler cap (on top of the engine, usually labeled), pour in about half a quart, wait a minute for it to drain down, then recheck the dipstick. Repeat until the level is between the marks. Don't overfill.

If You're Losing Oil

Some oil consumption is normal — up to a quart every 1,000-3,000 miles depending on your engine. But if you're adding oil frequently, there's a reason: a leak (check for spots under the car), worn piston rings, or degraded valve seals. Track how much you're adding and how often — that information helps your mechanic diagnose the problem.