Will Thicker Oil Stop Engine Knocking? [A Detailed Discussion]

A common complaint among automobile users is the annoyance caused by their car’s engine knocking. Some claim that thicker oil might well solve the problem. But you have to be extra sure whether thicker oil actually does the trick. Otherwise, there’s a chance your problem might get worse. 

So, will thicker oil stop engine knocking?

Engine knock can be alleviated by using thicker oil. But it will not solve the issue. Engine knock occurs when the octane level of the fuel is too low or inconsistent. Getting rid of a squeak requires a tune-up. Thicker oil would only be a Band-Aid for severe problems like rod or piston knock. The knock sensor is able to detect these.

You must still be unsure of what to do. Don’t be worried! You can rest assured. Because we’ve explained everything in a way that you can understand.

Jump right in and read the detailed article.

Which Factors Are Responsible For Engine Knocking?

Before getting to the details, you should know the cause behind the problem. Well, there are numerous reasons for engine knocking.

Here is a list of some that I’ve found:

Cause 1: Deposits of Carbon

Every vehicle has a carbon-cleaning detergent in its fuel. Carbon deposits aren’t usually prevented by them. When fuel and oxygen come into contact, it combusts Carbon molecules found in both diesel and gasoline.

Carburetor components are covered in carbon residue as a byproduct of combustion. This results in an increase in compression levels. The volume inside the cylinder is also reduced by this method.

Cause 2: Low-Rated Octane

When using low-octane gasoline, you can expect to hear an engine “knock.” Octane is a fuel rating. The rating indicates how well it can keep a fuel-air mixture from igniting prematurely in the engine.

The knocking you’re hearing is a direct result of this combustible material. A good octane rating is necessary if the knocking is to be avoided. Using low-octane fuel can cause severe engine damage.

Cause 3: Faulty Spark Plugs

Spark plugs produce the electric spark that ignites the fuel-air mixture. For your engine to run, you need spark plugs. Over time, the spark plugs in a car degrade, just like other car parts.

In order to get the most life out of a spark plug, its condition is key. Spark plugs should be replaced regularly, according to automobile manufacturers. You may need a new spark plug if you’ve driven for a long time.

Can a Thicker Oil Stop Engine Knocking?

Your old car engine’s noise can be reduced by using thicker oil or an oil additive. Because older engines have many lubrication issues, they are more likely to develop this type of noise. It may not be enough to use thicker oil if the engine has rusted or corroded parts. There is a need for a different approach in dealing with those issues. 

Thick oil can extend engine life and quiet the engine in some situations. But in others, it won’t do much. 

Older engines can benefit from a longer service life from thicker oils or oil additives with a thickening effect. In order to prevent rust and corrosion from accumulating between the metal components. In addition, they’ll be more secure in those areas. So, don’t go from a lighter to a heavier weight all at once.

Wondering how to switch to thicker oil now?

Well, at each level, you should work your way up to your goal grade. The same is true for oil additives as well, unfortunately. You can start by using a small portion of the bottle of oil additive you’ve chosen to use. Because sometimes, less is more.

For an oil additive, wait until you change the oil. Then start adding the correct amount of oil additive. Increased pressure on gaskets can lead to leaks. That is why it is essential to keep an eye on the oil additives in your vehicle. 

To sum it up: Changing your vehicle’s engine oil isn’t a cure-all. But it can help extend the car’s life.

It’s best to warm up your engine before adding the thicker oil. Give the oil time to do its job to the fullest extent possible.

Keep in mind that thicker oil will take longer to heat up. It means that lubrication will take longer.

Is Thicker Synthetic Oil Right for Stopping Engine Knockings?

Even though it’s not a necessity, thicker synthetic oils are often the best choice. Definitely, it will improve the engine’s lubrication.

Soluble in old engines may not provide enough lubrication to keep them running smoothly. It happens because of the oil’s high-slickness properties.

Your best bet is to drain the synthetic oil and return to the oil you were using before. If the noise doesn’t go away, you can try using a thicker oil.

In most cases, synthetic oil is superior to conventional motors for performance. There is, however, a downside to this. As an alternative, synthetic oil can also be used to quiet lifter noises.

Your vehicle may not benefit from using synthetic oil if its engine is more than a few years old. Thicker oils, such as mineral oil, can help older engines, but not as much as slick oils, such as synthetic oils.


There are a few other options for reducing engine noise. Below, you’ll find a few examples of viable alternatives:

Fuel with a High Octane Rating

The most essential factor in preventing engine knock is high-quality fuel. The fuel must be ignited at the proper time throughout the combustion process. Consult your nearby mechanic or expert for recommended octane ratings.

An octane booster is a viable option. That is made to help boost the fuel’s octane. Work for and maintain the highest octane rating possible.

Cleansing the Combustion Chamber

Regular cylinder cleaning should be practiced. Knocking can occur when the wrong fuel is used because it may not ignite at the right time. As a result, the cylinders are contaminated with more contaminants.

Your cylinders can be cleaned with fuel additives. The most popular gasoline brands often include detergents. That helps keep the engine clean. It’s as simple as picking up a fuel additive and adding it when you fill-up.

Using engine flush as a last resort if the detergent doesn’t work is another option. The engine flush removes the carbon deposits from the system. It also prevents them from returning. A clean cylinder helps to keep the car running smoothly.

Checking the Car’s Timing

Find the timing mark on the engine. The transmission bell housing has a small gap in it where the problem lies.

The patterns that are closest to the entrance are the ones you look for. It could also be referred to as a rubber cap. As a result, it keeps the bell housing clean.

Locate the first spark plug. You should use this one to check the engine’s timing. Check the manual if you’re unclear of the model number.

Make sure the parking brake is engaged as well. It’s important to park the car securely to not move around while you’re at work.

Before inspecting, turn on the engine and let it warm up. You must do this in order to obtain the most accurate results.

Connect the timing light to the first marked spark plug wire before continuing. Plugin your extension cord and turn on your light.

The results will be skewed if the initial spark plug isn’t used. Time-trial results can be interpreted by combining numerical data with the timing data. There will be no more engine squealing if the timings are adjusted.

So, try all of the suggestions if you want to take control of the machine. It’s a pain in the beginning, but it pays off in the long run. For a long time to come, the vehicle will run like a new one.

You won’t have to buy a new car every few years as a bonus. You can also keep it as a piece of art. To reiterate, thicker oil should be used for oil additives.


Question: Is it better for the engine to use heavier oil?

Answer: Using heavier oil can help fill in gaps between engine components. For the most part, thicker oil helps keep moving parts lubricated between coats of oil. The heavier the oil, the less likely it is to leak out of a leaking motor.

Question: How much does it cost to fix a knocking engine?

Answer: You may be surprised to learn that a complete engine overhaul can cost anywhere from $2,000 to $3,0000. As a rule, this service includes seals, seal gaskets, connecting rod bearings. This also includes cylinder head bolts, engine flushing, and more wonderful lines.

Question: Is it safe to drive an engine-knocked car?

Answer: A serious problem, engine knocking, should not be ignored. For an extended period, driving in this condition can cause severe engine damage. There is good news in that the problem can be resolved quickly in some circumstances. If your engine is making knocking noises, try the following three solutions.


Hope now you know will thicker oil stops engine knocking. As an additional reminder, thicker oil should be used with oil additives. When using oil additives, automobiles run more smoothly and more reliably. 

If you want to stop the engine from squealing, a thicker oil can be a great aid. Thank you for taking the time to read this. We hope you learned something from it!

We will be happy to hear your thoughts

Leave a reply