Bubbles on Oil Dipstick – Is it Bad?

You can use the dipstick to check the oil level in your engine. The dipstick is pulled out dipstick to read the oil level If you see bubbles, it means that oil tank froth has formed. Bubbles can occur when oil is too full, coolant leaks, or for other reasons.

An engine problem could be indicated by bubbles on the dipstick. This article will discuss the possible reasons for oil bubbles.

What causes oil to burst?

Engine oil bubbles when it is stirred and aerated. Air can get into the oil and cause bubbles if there is a temperature or pressure variation. Because of the oil’s high volume, air bubbles can form within the oil.

Bubblegy milky foam can also form when oil is mixed with other liquids. This bubbly oil can build up on the oil dipstick if you are checking the oil level. We have seen cases in which the dipstick is dry. Let’s take a look at the possible causes of bubbly oil appearing on the dipstick.

What causes bubbles on the Oil dipstick

1. Overfilled oil

When the engine oil level is too high bubbles and foam can form. Engines rotate using a crankshaft which is a fast-moving rod with lobbed ends. The crankshaft stirs the oil and aerates it when the oil level is too high. 

The oil begins to foam It can cause bubbles due to constant churning. You will see these bubbles on the dipstick as you check your oil level. To prevent the crankshaft rotating in oil, drain any excess oil and lower the oil level.

2. Head Gasket

It is important to properly seal the combustion engines with head gasket seals. The coolant may mix with engine fluids if the headgasket blows. A milky-froth-like film can form when coolant is mixed with oil.

When you check your oil, you will see light brown bubbles. To prevent coolant leaking into your engine oil, ensure that the head gasket has been replaced.

3. Cold climate 

Air particles can easily enter an engine if it is located in a cold environment. These air particles can be trapped in low-temperature oil and created bubbles. Froth may result from this bubbling. turning the oil milky

These air bubbles can pop out when the engine oil heats up during long car rides. You should drive 30-60 minutes every so often.

How to fix bubbles in an oil dipstick

If you see bubbles on your oil dipstick, it is likely that there is froth in the oil tank. It is best to drain the oil. To empty the oil, take out the drain plug. You want the engine to be just warm enough. This will reduce the oil’s viscosity and allow it to drain from the container more easily. To remove any remaining bubble oil, you can also use a vacuum cleaner.

Avoid bubbles on your oil dipstick

  • To prevent oil from bursting, don’t overfill your dipstick. Check that the oil level does not exceed the fill line. dipstick isn’t all covered in oil.
  • Make sure to fix the head gasket so coolant doesn’t leak into the engine oil.
  • If you live in colder climates, make sure you take long rides. The oil will heat up and cause the air bubbles to burst.

How do you check for a blown head gasket?

A blown head gasket can cause coolant and oil to mix. This could cause bubbles on your dipstick when you check the oil level. To check for a burst head gasket, it is best to examine the interior oil fill cap. If the interior of the oil fill cap is stained with brownish milky substance, it’s likely that the head gasket has blown.

How can you remove the air from your engine oil

It is normal for oil to be contaminated by air. Oil can freeze and trap air.  Oil heated can cause this air to pop out. This can be accomplished by taking long drives in the car. It is recommended that you drive your car at least 30-60 minutes each week for three to five consecutive weeks.


There are many reasons for dipstick bubbles. It could be caused by a coolant leak or overfilled oil tanks. If you live in colder climates, air particles can easily get trapped in oil, leading to bubbles in the oil.

Overheating can cause friction problems and engine damage. If there are bubbles on the dipstick, drain the old oil. If your head gasket has blown, make sure you fix it before you add new oil.

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