10 Best 4 Stroke dirt bike engine oil—Unleash the beast

To keep your engine running smoothly for a long time, you’ve got to use the best engine oil. For instance, the 4 stroke engine dirt bikes running on the course demand the best 4 stroke dirt bike engine oil as they can get pretty hot real fast.

If things don’t get cooled down, the engine might break down and come to a halt.

kawasaki 10w40 motorcycle oil

So, picking up the right fuel is something you can’t overlook. But many don’t do it right. That’s why you’re not getting the best out of your bike engine.

Don’t worry!

I’ve got some 4-stroke motorcycle oil that will change things for your enduro ride forever.

Best pick+Budget pick +Best choice:

If you don’t want to wait to find a good engine oil right away, you can choose from the options I’ve got here.

best 4 stroke dirt bike engine oil

Castrol 06112 Power oil


Castrol is undoubtedly one of the premium engine oil makers in the world. Choosing their 06112 power, you can’t do no wrong. It got a high viscosity to operate in both cold and hot temperatures. Plus, the race additives within the oil make it best for that extra bit of boost you’re looking to get from the engine.

best oil for 4 stroke dirt bikes

HONDA 08C35-A141L01 oil


For the best option, you can go either with the Honda or Yamaha. They are both excellent as they support a wide range of 4-stroke rides. And coming from top vehicle makers, you don’t expect anything less of excellence. They know to tap into the engine’s full potential to boost performance and improve mileage.

budget pick
150cc 4 stroke dirt bike

Valvoline 4 stroke oil


It might surprise you, but I would go with the Valvoline 782482 High Mileage with MaxLife Technology for my budget pick. It’s a great performance booster oil that solves some of the significant issues within the engine. And the 5QT bottle for the price it comes makes for a good investment in the long run.

Quick Comparison: Top 10 4-Stroke dirt bike engine oil

best 4 stroke dirt bike oil

Castrol 06112 Power Oil

4 stroke dirt bike oil

Valvoline 4-Stroke Motorcycle

best oil for 4 stroke dirt bikes

Maxima (349128) Premium4

dirt bike oil

Quicksilver 8M0078617

150cc 4 stroke dirt bike

Kawasaki 4-Stroke Motorcycle Engine Oil

best engine oil for 4-stroke motorcycle

Motul 108082 E-Tech

150cc 4 stroke dirt bike

Valvoline 782482 High Mileage with MaxLife Technology

4 stroke engine oil

Polaris Engineered PS-4 Synthetic

best 4 stroke dirt bike engine oil

YamaLube All Purpose

best 4 stroke dirt bike engine oil

HONDA 08C35-A141L01

The 10 Best 4-Stroke dirt bike engine oil:

For your engine, you’ve got to use quality products. And oil is the most important thing that you use for the machine. They help to improve your bike life by protecting the parts within the engine. On top of that, it also allows you to get better acceleration, power, and smoother gear changes.

If you want all that, you’ve got to get the best oil for 4-stroke dirt bikes. It’s as simple as that. But finding one isn’t that simple.

Until now, as I’ve got the 10-best 4-strokes oil lined up right here for you. Check them out.

1. Castrol 06112 POWER:

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You can’t help but bring the name Castrol to the mix while talking about the best lubricant. No surprise, the first one I’ve got here is from them—the Castrol Power 1.

What’s so special about it?

First of all, Castrol introduces something called the Trizone technology with Power 1. What it does is it ensures protection to the engine to give you optimal performance. But that’s not it. It even takes care of the clutch and gearbox to provide you with the ultimate riding experience on the motocross ride.

Plus, it reduces internal engine losses caused by friction. And it makes sure, inside things kept cool to perform at the highest level. The high viscosity of it takes care of things.

With the Castrol, you get a fully synthetic oil that comes with race-ready additives. Using the lubricant, you can get your 4-stroke engines ready to take on those highly demanding situations, such as those enduro race tracks, without any sweat.

That’s why bikers looking for the best performance always go with the Castrol.



Does it come in a pack?

Yes, you can get the Castrol Power-1 in a pack of 6 to save some bucks.

What’s the best feature of it?

The oil is perfect for the wet-clutch as it helps you enjoy the smooth performance.

2. Valvoline 4-Stroke Motorcycle:

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Many 4-stroke engine oil is too thick for your engine. It might not let the oil to flow right. And there may be parts where there might be no lubricating firm within the pieces. The metal-to-metal contacts, and the engine starts wearing out. Don’t start me out by talking about fuel consumption.

Pretty bad!

What you need is the Valvoline 4-stroke oil for the engine. The right consistency of the oil will flow through the engine fast, spreading everywhere to make sure there is no wearing out of parts. And it will transfer the heat better to let you enjoy the optimal performance from your dirt bike.

And for those wet clutch riders like the dirt bikers, the oil will keep your clutch lubricated to let you enjoy the smooth shifting and power transfer right away.

For those high temps, high RPM, and wet clutch rides, you need the Valvoline to seal the deal.



Does it come in a pack?

Yes, you can get it in a 1 QT bottle. Or you can get a pack of 6 if you like.

What’s the feature to love about it?

Dirt bikes use wet-clutch, and this lubricant is perfect for those wet-clutches as it makes shifting quite the treat.

3. Maxima (349128) Premium 4:

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When your dirt bike engine peaks its load, even the most high-performance engine starts to perform like a cheap one. To keep the engine running at its top shape, you’ve got to pour in the best 4-stroke dirt bike engine oil into it, just like the Maxima Premium4.

What makes it so unique is the formulation of the lubricant itself.

Kept made in mind all the weather conditions, the Maxima helps you take advantage of the wet-clutches to reduce friction. You get the perfect shifting action on those muddy tracks. And the engine will produce maximum power throughout.

The magic happens due to the exclusive petroleum-based blend and the anti-wear additive. Thanks to them, you get a strong film that keeps things cool inside.

Even cold start problems get solved using it. No more engine will get damaged as you will get the bike up and running no matter the location.

Just what every rider wants to hear—hot and cold, nothing affects it.



Can you get in packs?

You can get in a gallon, or a liter, or even better, get a case of 4 of those 1-gallon jars. Even there is a 5-gallon tube.

What’s the best feature of it?

The performance it provides is stable. You get a firm film throughout the engine to keep parts moving smoothly.

4. Quicksilver 8M0078617 4-Stroke Marine Engine Oil:

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If you want to enjoy a 4-stroke oil for the bike and your marine motors, then go with the QuickSilver 8M0078617.

Unlike any other oil, the engine oil uses special additive packages to help your marine engine outperform any other engine oil.

Using the oil, you can expect to avoid engine wearing. That’s because it creates a firm film around the parts throughout. The metal parts won’t get in contact anymore.

Even it helps to prevent corroding the parts. Your engine will last for a long time. On top of that, it maintains peak performance throughout the use of machines. Other oils can’t manage the extreme heat; it keeps the engine cool to eliminate any breakdown from extreme loads.

All in all, perfect to have in your kit.



Does it come in a pack?

Unfortunately, you cannot get the QuickSilver in a value pack option like many of the others.

What’s the best aspect of it?

No doubt, the versatility makes it suitable for both bikes and boats. It’s the feature that attracts most people.

5. Kawasaki 4-Stroke Motorcycle Engine Oil:

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For the Kawasaki owners, the best thing is the Kawasaki 10w40 motorcycle oil that they can feed their 4-stroke bike engines.

To keep your engine running clean and tap into its true power, you’ve got to try it out. The performance oil will create a nice layer inside the engine parts to make the flow better. It will not let the heat build that’s often the biggest culprit in losing those high RPM’s.

Instead, it will maintain a firm viscosity film to transfer the heat all around to keep the engine, clutch and gear boxes cool. You will get the high-performance from your Kawasaki no matter how hard you push it around.

Try it to feel the improved shifts and transmissions of your bike yourself. Everything will feel much better.



Is it available in a pack?

Yes, you can get in a pack of 4 to save some bucks on the purchase.

What’s the feature that makes the Kawasaki performance unique?

The support for bikes in all terrains is something that helps it stand out from the rest.

6. Motul 108082 E-Tech:

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In high temperatures, oil break down and build sludge that prevents the parts from moving correctly. And when it happens, it makes your life on the 2-wheeler quite hard.

To get things sorted, Motul comes with the E-Tech.

This 4-stroke engine oil, even in extreme heat, doesn’t let the sludge to develop. That’s why you get a smooth-running machine even when you’re pushing the engine hard and leaving nothing behind on the tracks.

It burns clean and keeps things cool to keep the parts moving like a well-oiled machine. There is no more friction to slow your wheels. Not only that, your engine will require less maintenance with the Motul in use.

And in those cold situations, when you find it hard to get the engine started, the lubrication will make things easy for you. Even you will feel the increase in power and less drag thanks to the 100% Motul synthetic oil running through the engine.



How much volume does it offer?

You can’t get in a pack. The only option you’ve got is a 1-quart bottle.

What’s the feature that makes the Motul E-tech so great?

Even the best of lubricants usually break down in extreme heat and cause the engine to slow down due to sludge—no such issue with the Motul.

7. Valvoline 782482 High Mileage:

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The high mileage Valvoline lubricant can make a huge difference in your engine. Often deposits in a 4-stroke engine are the reason you lose speed on the wheels. It’s a common issue that restricts the airflow causing loss of power within the engine.

It can get worse with time. Even might cause the engine to be damaged. To solve that, Valvoline got extra detergents that stop any such buildup in the engine. The airflow remains perfect for giving you the right oil and air mix to relish the bike’s real power.

In the same way, it avoids sludge buildup to make sure the parts within can move freely—no more slowing down. Thanks to the thick and durable anti-wear film provided by the oil, you get an even layer that prevents engine breakdown.

The fully synthetic oil with max life technology gives you over 75000 miles for riding the bike in the extremest of conditions without any problem.



Is it available in a pack?

You can get it in different options. You can get in a 1QT or 5QT bottle. If you want value pack options, go for any of the 1QT, 6 pack kit or 5QT, 3 pack kit depending on your budget.

What’s the best part about the engine oil?

It tackles the airflow issue, which is the biggest reason often engine speed goes down. With Valvoline, that problem would get taken care of for sure.

8. Polaris Engineered PS-4:

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Motul, Castrol 4 stroke motorcycle oil, and others mentioned till now are leaders in the industry. But if you want to find a dark horse that doesn’t get recognized as the others, then check out the Polaris PS-4.

It is no doubt on par with the rest when it comes to improving and taking the engine performance to the next level.

The first thing that makes the Polaris such a great option is its range. It s supports a wide range of vehicles as well as deals with a great temperature range. From your dirt bikes to ATVs to snowmobiles, the PS-4 is all you need to pour down to the stomach of your engine to keep things rolling.

But the heat range it can deal it is what makes it so extraordinary. It can operate at 100°F level extreme heat and even get the bike started below -40°F conditions— no problem. That’s the kind of viscosity range the oil presents.

You can imagine, your engine will run clean for years with regular use of it, no doubt about that.



Is it available in the pack?

Yes, you can get two 1QT Polaris in a pack.

What’s the feature that makes it great?

Its operation in a wide range of temperatures is one of the best I’ve come across.

9. YamaLube All Purpose 4 Four Stroke Oil:

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Don’t want to gamble with the bike lubricant? Then go safe for your 150cc 4 stroke dirt bike with something like the YamaLube.

Coming out from Yamaha, you can pretty much imagine, they know a thing or two about making the best use out of the engine. That’s the case with the YamaLube here.

The all-purpose oil works for a wide range of 4-stroke ride, making it a great option to have at your disposal.

On top of that, it got those performance blend minerals that improve the clutch performance to make shifts smoother. At the same time, the firm film over the engine stomach makes sure there is no wear and tear at all.

It keeps your engine airflow smooth and the transitions on the spot to give you the boost when you want them. No more drags with the Yamaha flowing through your engine veins.



Can you get it in the pack?

For those who are looking to get good value for the money, they can get two 1 gallon YamaLube in a pack.

What’s the best thing about it?

The support for a wide range of vehicles is truly what makes the YamaLube unique.

10. HONDA 08C35-A141L01 Honda:

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Just talked about the Yamaha, and how am I supposed to not bring out the name Honda. It is the fitting end for the list with the inclusion of the Honda Pro oil.

The GN4 is the crown jewel of honda dirt bike oil that made them so famous. You can use them with a variety of rides like the Yamaha.

Besides that versatility to use it on many rides, you get lower fluid friction using it. That makes for better performance in overheated conditions within the engine.

Plus, the higher film strength allows you to deal with the load better while keeping the flow quick to keep your engine performing at its best.

You get the most out of your engine as there isn’t much drag. Those are what every rider wants to hear.



Is it available in the pack?

Right now, you can buy it in a bottle; no packs are available.

What’s the feature that makes the Honda great?

The GN4 feature allows it to deal with a variety of 4-stroke oils with the same quality.

How to choose the correct oil for your dirt bike

Choosing the right 4-stroke oil isn’t no rocket science. Obviously, you’ve got to know some stuff about the oil, which I will discuss later in the buying guide. But the very first thing you need to do to pick the correct lubricant is to go through your bike’s manual.

That’s the basic stuff.

Because if your bike uses a 10W-40 viscosity oil, you need to comply with that. Don’t use 5W-40 or 15W-40. To get the best performance, stick to the manual, and get the right oil type.

best 4 stroke dirt bike engine oil Buying guide:

Lubricants are essential to keep the internal components of the engine running smoothly without any friction.

But people often make the mistake that all engine oils are the same. No wonder they pour the wrong stuff in their bike engine and do more harm than good.

You might think it ain’t that hard to pick an excellent 4-stroke oil. But before going ahead, you’ve got to know some things. And that’s what I want to discuss here in this buying guide.

Let’s get on with them.


You’ve got to know about lubricant types. There are more than if you don’t know. And depending on the type of oil you use, the performance you will get from the engine varies. For instance, if you go with typical mineral 4-stroke oil, you will get around 1000 or 2000 km of mileage. Not to forget, it might not do any favor in hot or cold conditions.

The semi-synthetic ones might lower the friction within the engine and boost some power, and the mileage will be better. Still, it might not be able to unleash your dirt bike on those tracks for racing.

To maximize the power and reduce wearing, you’ve got to go with fully synthetic oils that give you better mileage and no doubt an improved engine life.

Viscosity level:

This is something that confuses a lot of people. If you got a bottle in front of you or look up one on the internet, you will see some number like 15 W 40 on it.

That’s the viscosity level of the oil. The W separating here between the two numbers stand for Winter. The first number being lower is good as it will give you better oil flow in low temperatures. So, you will get quick starts on those chilly days.

On the other hand, the second number being high is good as it shows the thickness level in high heat conditions within the bike. For long riding where your engine is at work, this one will help you ride without any problem.


You’ve got to look for them. There are many additives added to the engine oil to improve performance. Then some help to prevent sludges and deposits within the engine. Others help to reduce wearing within the machine.

Meanwhile, others add the extra boost you need for the racing conditions. So, having additives within the oil is a good sight.

Oil changes:

How often you need to change the oil is something you should seriously consider before making the purchase. If the bike oil requires you to do it often, then it is not the best choice. The idea here is to ride as long as you can before making the oil change. How easy the oil makes the change is also a point to consider.


There are many standards that you need to review before choosing a lubricant. For instance, JASO, which stands for the Japanese Automotive Standard Organization certification, is a standard that you need to look for. It gives you the idea that the oil with such a certificate is excellent not only for the bike engine but also for the clutch and gearbox performance.

There are more classifications of these standards about which you should learn to make sure you’re making the right choice while picking your 4-stroke engine oil.

At least, a 4-stroke dirt bike oil with such certification makes it easy for you to pick them as you know they are better than those that don’t have one.

Frequently Asked Questions:

What kind of oil does a 4 stroke engine take?

The most common oil that the 4-stroke engine take is the 10W40. For more demanding engines, it is 10W60.

What’s better, 2 strokes or 4 stroke dirt bike?

It depends on user preference. A 125 cc 2 stroke engine is the same as the 250 cc 4-stroke. So, 2-stroke can produce more power as you can, but the 4-stroke engine runs clean, and they offer a stable performance compared to their counterpart.

Which is better, 10w30, or 10w40?

In cold conditions, both the 10w30 and 10w40 offers the same performance. In the higher temperature conditions, the 10w40 viscosity makes it more suitable to tackle the heat, making it better.

What oil should I use in my 4 stroke dirt bike?

You can try any of the above, depending on your bike manual. Go with Castrol, Motul, Honda, Yamaha, whichever you prefer, they are great for 4-stroke engines.

Final Thoughts

If you’re looking for the best 4 stroke dirt bike engine oil, by now, you should have found one. Even if you don’t, you now know what you need to look for to get the best out of your bike.

Either way, it is vital to treat the bike engine ride.

So, don’t just pour anything you find. Do some research and give it the right stuff to make the engine perform better.

Happy riding on the trails.

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