What Is The Best Way To Engine Oil Flush

best way to flush an engine

You should flush your engine oil frequently to ensure your cars run perfectly and return possible fuel economy. However, it’s time to flush if your engine gets clogged with oil deposits. Please stay with us to learn how to flush your engine oil.

If your heart is clogged, then to remove it, your doctor and you will want to do everything. Like your heart, the engine is the life of your vehicle— if it gets stuck and debris, it can cause unfortunate damage to your engine.

So, if you do engine oil flush in time, it can remove the carbon buildup in your oil system and engine. Dirty engine oil can decrease efficiency, cost you enough money, and affect fuel economy.

What is Flushing Engine Oil?

Engine oil is used in vehicles to keep the engine running smoothly while the wheels turn. But after riding it a particular mileage, the oil gets old, and it starts to accumulate sludge and other garbage.

And it not only slows down your car but also causes many problems for your vehicle’s engine. So, to reduce engine oil flush costs, you should keep it in mind.

Keeping all these things in your mind, you have to follow a process known as engine oil flush. After adding new oil and draining the old oil, it will happen. You need to add particular chemical additives to your car’s engine in these processes.

When Should You Have An Engine Oil Flush?

If you notice that your engine is blocked with old oil sludge, it’s time to free it. You may have heard of engine oil flushes and seen DIY products available instead of going to the garage, but engine flushes aren’t the right way.

Yes, you will break up the sludge, but you also risk forcing particles into small parts of the engine that are not meant to enter.

You may have heard about engine oil flushes, but some people use DIY products instead of going to the garage. You may want to break up sludge and risk forcing particles into small engine parts.

You can avoid this if you use environmentally friendly bio-fuel food-grade white oil instead of engine flush. Do you want to know the best engine oil flush for a petrol car? Generally speaking, Liqui Moly is the best engine oil flush for petrol cars. So, to flush your petrol car engine, you can pick this Liqui Moly.

Best Way to Flush Engine Oil:

Firstly, you may think that engine oil flush is good or bad. We want to say that an engine oil flush is necessary for your engine’s health, especially in major maintenance. At least once after a long period like 50000 miles engine flushes are necessary.

If you don’t get service and don’t change the oil in your engine after ages your engine oil will lose its viscosity & other parameters and make sludge. With the best engine flushing oil, you need to flush your engine immediately in time for an oil change. You may do it with the regular engine oil, that are you currently using.

Read Also: Overdue Oil Change Symptoms

You should immediately follow the engine flushing procedure to get your engine back to working condition. Usually, you require a few things for that purpose to do the process. They are-

● Flush treatment

● Fresh engine oil

● A new oil filter

● A large container to fill the old oil

● An oil filter wrench

best engine flush
Engine Oil Draining

Step 1

First, you have to ensure that your engine is calm. It’s because it allows fluids to flow more easily through the engine. Open your engine hood, and now remove the cap of the engine. Then, pour the required engine flush treatment into your engine. And tighten the cap and close its hood.

Step 2

Start your engine and let this engine idle for 10 to 15 minutes. Nevertheless, if the mud is more severe than expected, it may take some time. The additive present in the treatment is a type of strong detergent that can thoroughly clean the engine.

Step 3

After 15 minutes, you can stop your engine and drain this oil if your cleaning process is done. To do this, you must remove the drain plug and put the container properly. And let the old oil and sludge flow into it. If you want, you can use compressed air for this task for better results.

Step 4

In addition to changing the dirty oil, you will need to replace the existing oil filter. This must be done before adding new oil. To do this, using the oil filter wrench, you need to loosen the oil filter and drain the excess oil.

Now take a new oil filter, and add the new oil to the filter gasket. Put this filter gasket in the right place and tighten it with your hand. Drag the plug-in into your engine when finished.

Step 5

Before adding new oil, ensure its grade, weight, and rating are according to manufacturer instructions. Particularly, now you need to pour the engine with oil slowly. At the same time, to avoid overfilling, you can use a dipstick to check the oil level.

Step 6

After completing the full process successfully, you need to turn the oil cap and turn it tightly to close it. Finally, close your engine, and thus, you are done.

Benefits of Engine Oil Flush:

  • Better Engine Performance:

If you flush the old engine oil and sludges from the engine sump, your engine performance will improved. But for that you have to do it by proper way with proper flushing oil.

  • Improved Fuel Efficiency:

After engine oil flush your engine oil flow will increase and by this the fuel efficiency will better than pervious.

  • Reduce Emission:

By doing engine oil flush in proper way your engine incomplete combustion will decrease which will reduce exhaust emission.

  • Better Engine Protection:

If you flush the engine , then engine components will be free from old sludge, dust, and other harmful materials. This will ensure a better life of engine parts and components.


Q. How to engine oil flush?

First, add the flush product to the engine to do this job. Make sure you replace the engine cap, that’s always important.

So, let it idle for 10-15 minutes and the flush product will do its job. Shut the vehicle off now.

Then you are going to perform a normal oil change. Likewise, you will notice that the oil coming out looks a little darker. It might look a little bit watery. Before doing it make sure you are changing the oil filter.

Any varnish that got broken loose by the flush product is going to end up in the oil filter. Be sure you replace it with a brand-new one. Then you need to refill the vehicle as you would normally.

Check your owner’s manual for the capacity of your vehicle. It’s always a good idea to check your oil level. Put the plug back on, clean up your mess, and you are all done.

Q. What is Flushing oil?

Flushing oil is a solvent-free, detergent chemistry oil system cleaner formulated to aid in the removal of smooth sludge while changing engine oil. It comes from a useful detergent package and low-viscosity base oil.

Q. Is an engine flush good or bad?

A good engine flush helps loosen deposits and removes sludge, restoring your engine to like-new situations. Therefore, on older engines, sludge may be the only obstacle to oil drainage through cracked seals.

Q. Is it necessary to use an engine flush when changing the oil?

No, engine flush is not required in every engine oil change. You can do it after 3 or 4 engine oil changes or once in a year. It is best for you to do it, in time of major maintenance of the engine. But if you find sludge or carbon deposits inside the oil line or tank, then you should do it immediately. Actually, it depends on your engine condition and engine running history. Engine flushes are also necessary if you find milky oil or use the wrong oil mistakenly.

The Final Words

Generally, if your heart arteries are blocked, they cannot perform properly. The engine is like your heart; if your engine is clogged with deposits and sludge, it will not work properly. That’s why an engine oil flush procedure is an essential cleanup program because it helps run smoothly. Ergo, keep flushing your engine oil frequently to make your ride trouble-free.

Read Also: How To Flush Oil Cooler? (Explained)


I am Engr. Z Eusuf Lubricant Specialist, Mechanical Engineer & has been working with engine lubricants for a long time and knows what makes them work best. I can help you find the right oil for your needs, and I have tips on how to keep your engine running at its best.