What Happens When You Use WD-40 as Engine Oil? (Explained!)

The WD-40 has been very well known in the world today for doing amazing things in metals. But many people are asking if you can also use WD-40 as engine oil. If you have the same question, let us learn more about it.

So what happens when you use WD-40 as engine oil? The answer is “nothing good.” A WD-40 is an excellent product. However, it is not used as engine oil but as a water displacement solution.

Using WD-40 as engine oil can cause your engine a lot of problems. This is not used as a lubricant of the overall engine of your car. This will work better in any metal and will prevent it from getting rust and corrosion. 

Now, let us learn more about the uses of WD-40 and what would happen if you will use it as engine oil. Let us get started.

What Happens When You Use WD-40 as Engine Oil

Can You Use WD-40 as Engine Oil?

No, absolutely not! Let us first define what a WD-40 is. A WD-40 is used as a protection for metal against rust and corrosion. 

This is also used to penetrate stuck parts, displaces moisture, and can also lubricate. However, this must not be used as engine oil. This is often used to prevent metal from rusting and from corrosion. 

If you use this as engine oil, there will be no good outcome of doing so. A WD-40 might have the ability to lubricate but not an engine part. And it is not a lubricant of the engine. 

This WD-40 is a water displacement solution. This will keep metal from rusting. Some people would use this as engine oil because they view it as oil and a lubricant. 

Technically, the WD-40 is oil, but it is not engine oil and must never be used for the engine. This is also not a lubricant of engine parts. If you use a WD-40 as engine oil, it will guarantee you a hazardous result. 

Your car’s engine will overheat and can burn up. Some people would try this as a curiosity, but you do not have to. There are so many videos online circulating that show the result if you used a WD-40 as engine oil. 

The result, though, would boil down to your engine burning up. So the bottom line is that you do not need to try. The result is terrible.

What Happens When You Put WD-40 in Your Engine?

Using a WD-40 as engine oil is strictly prohibited. But it is not a secret how amazing WD-40 can do with your engine. This WD-40 can even help you improve the performance of your car. 

This WD-40 can remove dirt from your car engine covers. Your car’s engine cover can have dirt and rust for an extended period. This WD-40 will help you clean and maintain the cleanliness and beauty of your car engine cover. 

This WD-40 is also suitable for your spark plug. Your spark plugs can also accumulate dirt and rust over time. This must be cleaned because it will have an excellent result on your car’s performance. 

This WD-40 can clean some oil. The WD-40 can do a lot of amazing things with your car. You have to use it correctly and adequately. 

If not, you will experience severe problems along the way, like using the WD-40 as engine oil. You can use WD-40 to your engine but just choose parts. You can apply it to your spark plugs or even your engine covers. 

You must not use it all over your engine. If you want to be sure about it, you can ask a mechanic or visit a service center.

WD-40 as engine oil

Will WD-40 Help Start an Engine?

Some people ask if they can use WD-40 as a starting fluid or can WD-40 help start an engine. The answer would be “yes.” If you will use a WD-40 as a starting fluid, it is safer than any other product. 

Many people are using WD-40 as a starting fluid, and their feedback is all great. Some people would also say that a WD-40 can be used as a starting fluid, but it is not a starting fluid. However, this fact does not stop them from using WD-40 as a starting fluid. 

It is just that people that are currently using it are not experiencing any problem, so they continue using it. So if you are looking for a product that you can use as a starting fluid, using a WD-40 is fine. 

This is a safe product, and many people have been using it and experiencing no problem at all. So using a WD-40 will work just fine.

Can You Put WD-40 in Your Gas Tank?

A WD-40 can do a lot of amazing things for your car. A WD-40 can be used as a lubricant, and it is also used for the protection of metals against rust and corrosion. But can you use a WD-40 in your gas tank? 

The answer to this question is yes. There are a lot of enthusiasts that put WD-40 in their gas tank. They would put a WD-40 to the gas tank together with the fuel. 

They would do this to help clean the tank, and it can also remove contaminants. These contaminants may be but not limited to water, and water should not be in the fuel. Of course, the effect of adding a WD-40 to your gasoline in your gas tank will depend on some things. 

The effectiveness will also depend on your type of gasoline that you are choosing to use. The effectiveness will also depend on the type of fuel system in your car. 

So you can use and put WD-40 in your gas tank. However, if you are having doubts, you can always seek an expert for the job.


In summary, the WD-40 is an excellent product. It also does a lot of amazing things. It protects metal from getting rusty and having corrosion. 

But a WD-40 must not be used as engine oil. You will encounter problems with it. Your car can burn up. There are plenty of bad things that can happen, and you can see them online.



Image credits – Canva

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My name is Hank, and I've been in the automotive industry for 27 years. I've been working in my own auto repair shop for the last 13 years, and now I want to help you here, on my blog. Let me know if you have any questions. Read more