How To Flush Milky Oil From Engine

You may have noticed a milky substance in your oil if you’re experiencing engine troubles such as engine failure, engine damage, or engine overheating. Milky oil is often a sign of some things, such as engine coolant mixing with the oil, which can indicate serious engine problems. Thus, ignoring this issue can lead to costly repairs and even more severe engine damage.

To prevent further damage, it’s vital to take action to fix milky oil as soon as possible. The best way how to flush milky oil from engine is to perform a coolant flush. This process involves draining the coolant reservoir and flushing it with water and a cleaning solution to remove any buildup or debris.

Before starting the engine start up the process, it’s essential to check the coolant level and inspect for any coolant or oil leaks. Checking the drive with milky oil and the drain plug for any damage is crucial. If the engine block or cylinder head is damaged, it may require a more extensive repair or replacement.

In our guide, you can find the other reasons you may have milky engine oil. By the end, you’ll be armed with all you need for what causes engine oil mixing with water and how to flush milky oil from engine to prevent the engine’s water vapor from causing milky engine oil. (Learn How To Lift An Engine Without A Hoist)

Flushing Milky Oil From Engine

What Is Milky Oil?

Milky oil is a common automotive problem that can occur when condensation or water accumulates in the engine’s oil. If left unchecked, milky oil can lead to corrosion and other damage to the engine’s internal components.

The best way to prevent milky oil from forming is by regularly checking your vehicle’s oil levels and ensuring that all seals are properly maintained and lubricated. Milky oil is a mixture of engine oil and coolant that appears milky or creamy in color and consistency.

This mixture often occurs because of a head gasket failure or other engine problems that cause engine coolant to leak into the engine oil. When you have a head gasket leak or coolant mixing with your engine oil, this creates a milky texture that can be seen on the dipstick or oil cap.

If left untreated, milky oil can cause severe damage to the engine, including engine failure, engine damage, and overheating because of improper lubrication. The coolant can also damage the car’s moving parts and reduce efficiency, leading to costly repairs.

Regular maintenance of the car’s engine and its components, such as checking the coolant level, inspecting for leaks, and changing the oil regularly, can help prevent milky oil from occurring. (Learn How To Use Engine Hoist)

Best way to clean milky oil out of an engine – a step-by-step guide

Here’s a quick look at how to fix the milky oil in the engine. The first step in flushing milky oil from an engine is to mix up the oil and do a quick oil change. To do this, you must open the engine oil cap and pour about half a quart of new oil.

Make sure you use high-quality, synthetic motor oil for this step. Once the new oil has been poured in, put the cap back on and let it sit for 10 minutes to mix with the white oil in the engine.

The next step is removing all the old milky oil from your engine by draining it out through a disposal container or recycling facility. This can be done by removing the oil drain plug at the bottom of your engine oil pan and draining all the old oil into your disposal container or recycling facility bin.

Once all the old milky-looking oil has been drained out, replace the oil drain plug and top up with fresh regular motor oil until you reach your desired level on your dipstick gauge. Finally, start the engine and leave your car running for around 15 minutes before turning it off and checking that there is no more milky appearance on either your dipstick or within your engine parts or vehicle’s drain area, or there is no smoke coming from your exhaust.

if you need to flush milky oil from the engine and need an alternative solution. Here are some solutions for flushing oil from the engine and oil pan.

Running with fresh oil

1. Run with fresh oil.

  1. Aim to flush milky oil from the engine and leave it empty.
  2. After draining your engine block, fill up to the recommended oil level, and drive your vehicle for a while. Once at the right operating temperature, the heat should burn out the majority of the moisture in the oil.
  3. We advise running the engine for at least 30 minutes at operational temperature.
  4. Drain your engine from the drain plug, and replace it with fresh oil.
  5. Of course, don’t forget to replace the oil filter.
  6. Inspect the dipstick at this stage and see if everything seems good. If the engine is still functional, drain the oil, replace it with fresh oil, and carry on as usual.

2. Flush with diesel fuel

Adding diesel fuel to your engine is another effective method to remove milky oil residue.

  1. Add one gallon of diesel fuel into the engine after draining the old oil and milky residue.
  2. Let the diesel sit for a few minutes to break down and removes sludge from your engine.
  3. Only use diesel as a rinsing agent; do not start the engine.
  4. Last, add regular oil to your engine and start the vehicle.

Ensure that all diesel fuel has been removed from the engine. Otherwise, it will thin down and degrade your regular oil, possibly harming the bearings and reducing the lifespan of your car’s engine.

3. Use a Commercial Cleaner

If you go to a service center, they will use this to flush your engine, although you can purchase these to do it yourself.

Engine treatment oil additives effectively eliminate sediment and milky engine oil. To wash away milky oil, instead of going through the difficulty of extracting diesel fuel, use such a product.

Add this engine oil to your vehicle and travel 250 – 500 miles.

After that, remove the cover of the engine oil filler to reveal an immaculate engine. (Read Check Engine Light After Oil Change)

How Much Water Does It Take To Make Milky Oil

Is milky oil in the engine bad? This is a common question. The amount of water required to make oil milky depends on several factors, including the size of the engine, the amount of coolant in the system, and if it comes from a serious problem.

Generally, not many cars, even a tiny amount of coolant leaking into the engine oil, can cause milky oil. A blown head gasket or damaged engine block or cylinder head can cause significant coolant leakage into the engine oil, resulting in more water mixing with the oil.

Additionally, if you drive with milky oil, it can cause further damage to the engine and increase the amount of water in the coolant mixed with water vapor in the oil.

It’s essential to address the root cause and issue of milky oil as soon as possible to prevent further damage to the engine.

Changing the oil regularly with regular maintenance helps prevent the occurrence of milky oil by ensuring the coolant level is adequate.

How To Remove Water From an Engine Crankcase?

Water in the crankcase of an engine can seriously damage the moving parts and reduce performance by causing milky oil. To stop further damage, removing the water and flushing milky oil as quickly as possible is crucial.

Here is a step-by-step guide on how to remove water from an engine crankcase:

Park your vehicle on a level surface, or you won’t drain or fill your car with oil correctly.

Draining the Oil

1. Drain the Oil

Oil from the engine should be drained and placed in a container for disposal. Look for signs of water contamination in the oil, such as a milky tint or consistency.

2. Remove the Oil Filter

Remove your oil filter and dispose of it properly after inspecting the filter for water contamination.

3. Add Flushing Oil Cleaning Solution

To the engine crankcase, add a cleaning solution made for engine oil. Observe the manufacturer’s recommendations for the amount to add.

4. Run the Engine

To distribute the cleaning solution throughout the engine, run the engine for a short period. This will help to break up any oil and water mixture and remove any remaining water from the engine when you start flushing oil.

5. Drain the Cleaning Solution and Milky Oil

Drain the milky oil and cleaning solution from your engine. Collect it in a container for safe disposal.

6. Refill with Oil

Refill the engine with fresh oil and a new oil filter. Follow the manufacturer’s instructions for the correct type of oil filter wrench, recommended oil amount, and amount of oil to use.

7. Check for Proper Functioning

Start the engine and check for proper functioning. Check the oil level and inspect for any signs of water-contaminated oil contamination.


Removing water from an engine crankcase is essential to prevent further damage to the engine. Regular maintenance and inspections can help prevent water contamination by ensuring the engine’s moving parts are properly lubricated, no leaks, and the oil is changed regularly. (Read Car Engine Shaking At Idle)

Head gaskets


Do head gaskets always indicate milky oil?

Milky oil doesn’t necessarily mean your head gasket or oil pan is faulty. The milky oil in your pan can be caused by coolant leaking into it.

How can I determine whether the head gasket is blown?

The head gasket shields the engine block and cylinder heads from engine coolant.

By removing all the spark plugs, a leak they may cause can be found when they malfunction. Start the engine, pressurize the coolant system, and inspect the spark plug holes. Any hole where the coolant is found indicates that the head gasket has blown.

Why does motor oil have a milky appearance?

The milky look of engine oil indicates the presence of coolant. The coolant will also make the engine oil appear milky.

Broken casings, a blown head gasket, or a malfunctioning transmission cooler are all potential causes of milky oil.

Is using milky oil in my car safe?

No, milky oil cannot be used to operate a vehicle. Your engine will wear down more quickly because milky oil does not lubricate and causes excessive friction, heat, and abrasion.

How long is milky engine oil safe to use in a car?

Milky oil should never be used in a vehicle since it creates significant friction and abrasion damage to the engine.

How To Flush Milky Oil From Engine