The Best 4 Stroke Dirt Bike Oil: Which Brand Is Right For Your Bike?

As An Amazon Associate I Earn From Qualifying Purchases

4 stroke dirt bike oils are expensive, but that’s not even the worst part. It’s such a drag that you spend a lot of money, but you don’t get the features you need.

Maybe there’s no anti-shudder protective element, or let’s say it can’t stand with high temperatures. You might get too much debris out of it. Most importantly, it doesn’t juice up your dirt bike’s engine that well.

Maxima 349128


Maxima (349128 Premium4 10W-40 Motorcycle Engine Oil - 1 Gallon

  • Anti-Scuff additives
  • Works best even at high temperatures
  • Ensure optimal performance

Budget Friendly

Valvoline 4-Stroke Motorcycle Full Synthetic SAE 10W-40 Motor Oil 1 QT

  • Smooth-shifting
  • Maximum power transfer
  • Anti-wear technology

Editors Pick

Motul 104092 Synthetic Engine Oil

  • Oil meets the JASO MA standards
  • Extreme pressure formula to protect gearbox
  • Notable oil brand

Now, we’ve done our researches to find the best 4 stroke dirt bike oil for robust riders. It turns out, these are pretty affordable and gives your bike the efficiency and power it needs. How about we show you something that’s worth your time and money?

What Is the Difference Between 4-Stroke and 2-Stroke Dirt Bikes?

If your riding style of a 4 stroke dirt bike differs from the next guy, the answer to this question will also be different from the next guy. There is not a “better option” between the two. However, differences as follow make them likable depending on the preference of the persons riding them.

Movement of Pistons

When it comes to completing the 4 stroke dirt bike engine cycles, a 2-stroke engine completes the task in 2 movements of the pistons focusing on compression and combustion.

On the other hand, the 4-stoke engine technology completes it in 4 steps: intake, compression, combustion, and exhaustion.

The 2-stroke engine life fires each revolution of the crankshaft, while the 4-stroke engine life fires every two of those revolutions, increasing the power output and stability that you get from riding these, making it perfect for beginner riders.


You would think that since the two stroke oil engine needs to do double the work in 2 steps, they’d be heavier. Instead, they are more lightweight. So when you are moving fast, and you need a make a split-second decision on the abrupt turns and obstacles, 2 stroke oil engines are better as they both accelerate and decelerate fast.

On the other hand, 4-stroke engines are heavier, have more counterparts, and make a larger engine. So when you need to replace a part here, you need to do more work by the strokes in presence.

Cleaning Ease and Maintenance

While it is easier to clean the considerably simpler mechanics of the 2-stroke engine, maintaining them is harder. Ironic, right? But these engines have some counterparts that require you to frequently indulge in the upkeep and maintenance as they are more susceptible to wear and tear.

Shifting and Riding

You need to shift more often in 2-stroke dirt bikes than the 4-stroke ones. This is because, in the latter, you have a wider powerband that lets you ride at different efficient speeds, leaving you with the choice to shiftless. Needless to say, the 4-stroke bikes are easier to ride.

Fuel Consumption

Doing twice the work of 4-stroke engines, 2-stoke variants are more harmful to the environment as it is higher at double the speed.

When you start such engines, you always see a smoke emission, which is undoubtedly harmful to the environment. Compared to these, 4-stroke engines are more environment-friendly.

Why hasn’t somebody invented a carbon fiber dirt bike handguard? It’s such an overlooked accessory that would keep your hands safe during those long summer days out on the open road.

Reviews on the 10 Best Engine Oil for 4 Stroke Motorcycle

If you do not want to feel like you are riding the half-a-century old lawnmower at your grandparent’s, it is essential to invest in the best dirt bike oil.

But which one should you pick from the plethora of options available? We reviewed 10 of the top picks based on the type (mineral vs synthetic dirt bike oil), viscosity, additives, heat dissipation, cleaning agents, and much more.

1. Valvoline- Best Oil for 4 Stroke Dirt Bike

Valvoline 4-Stroke Motorcycle SAE 10W-40 Motor Oil 1 QT, Case of 6

If you were looking for the best motor oil for your motorcycle or motocross bike that would serve you well in the hot weather Valvoline is here to deliver.

Why Is This a Top Pick?

This 4 stroke oil sustains itself in really high temperatures and remains liquid, preventing the oil film breakdown that most regular engine oils are guilty of, giving you optimal performance for a smooth ride.

Need perfect shifting? Valvoline delivers again! The anti-shudder protective and anti scuff additives element in the best engine oil gives you not just that but also the maximum power transfer you would want, providing an exceptionally well-wet clutch performance to 4 stroke dirt bikers like you.

The dirt bike engine oil also offers A-grade lubrication for a smooth run on not-so-smooth terrains. As a result, your dirt bike engine stays friction-free and is protected from corrosion even when you are riding long distances.

Another thing that you will like about this bestanti scuff additives oil is that it keeps your engines dirt-free. Since it is made with superior cleaning agents, your engine can remain safe from seeing unwanted carbon deposits or dirt and debris, making it as easy to clean as it is to ride with.

The next time your hands start to sweat while riding, just take a break and finger-wrestle with that dirt bike grip. It might be one of the best decisions you’ve ever made.

So if you want a ride from NYC to LA without seeing spillage or stalling in your way, the proprietary blend of high-quality base engine oils and excellent additives of Valvoline has got your back! However, you would only wish the mileage was a tad bit higher.

2. Maxima 349128- Best 4 Cycle Small Engine Oil

Maxima (349128 Premium4 10W-40 Motorcycle Engine Oil - 1 Gallon

Looking for oil that can increase the lifespan of your engine? Wait, can a 4 stroke motorcycle oil do that? The answer to both the questions is yes, and it’s a yes from Maxima.

Why Is This a Top Pick?

So what allows this stroke oil to help the engines in their performances? The superior additive technology with which it is made increases the stability that you get from the same oil to keep both water-cooled and air-cooled engines responsive.

Regarding the composition, this oil is made of a petroleum base, with which there has been an inclusion of anti-wear and anti-shear elements and extra surface-active additives.

Here are some other great things that you will enjoy: the addition of anti-scuff additives and superior performance; both are a fantastic combination!

What’s unique about the Maxima oil is that it keeps your engine clean for a long while, and we recommend it for the wet clutch.

Unquestionably, it is the best oil that enhances clutch slip control, and having wet clutches you can enjoy a smooth start when you power your motor.

So if you are someone who is not into maintenance and upkeep, but you also don’t want this stroke dirt bike oil and debris to create setbacks in your bike’s optimal performance, this is it.

All of these including wet clutches , allow you to handle extreme loads on the engine, untroubled. It also cuts down on the friction and keeps the engine’s high temperatures to steady making it perfect to be used to carry your engine through all weather. However, the addition of increased power output from the engine oil would have been massively helpful that gives the superior performance for a smooth shifting ride.

The dirt bike stand is a special storage for your favorite two-wheeler. You can find details, such as dimensions and price information on the website

This premium motorcycle oil is designed for 4-stroke engines that will give you better oil flow.

3. YamaLube All Purpose- Best 4 Stroke Motorcycle Oil

YamaLube All Purpose 4 Four Stroke Oil 10w-40 1 Gallon

Take a survey of some dirt bikers, and Yamalube is going to make it to the list as the motorcycle engine oil that helps engines ride on all-terrains. If that is generic for you, this particular dirt bike oil is made by the ones that make the Motocross. That should be enough reason to get it, but let’s explain why these engine oils deserve the fame they get.

Why Is This a Top Pick?

First off, these motorcycle lubricants are made for every biker ever. If you own a snowmobile, a scooter, a street motorcycle, a street cruiser, an off-road trailer 4 stroke dirt bike, an ATV, or anything that you can think of that has to do with on-road and off-road riding, this dirt bike engine oil can be your friend providing the optimal performance for a smooth ride.

Now, if you like to ride through rough terrains, you should get a fork oil that can help you maintain and keep track of the friction and film without taking a toll on the shifting.

Thankfully, you can do all of that with this stroke oil filter, making it perfect for clutches and free of viscosity loss.

A chain is a vital component of your bike, and selecting the right lube can be difficult. Find details here.

You can also keep your engine protected from all the wear and tear with this mineral oil. So if your sticky clutch and the problematic gear shift are giving you a headache you don’t deserve, the YamaLube can be the Aspirin you need. Just remember not to use it for racing bikes or side by side vehicles purposes.

4. Castrol 06113- Best 4 Stroke Dirt Bike Engine Oil

Castrol 06113 Power RS 5W-40 4-Stroke Motorcycle Oil - 1 Quart, (Pack of 6)

Have you seen environmentalist 4 stroke dirt bike riders? If you have, here’s a 4-stroke motor oil they can blindly rely on and will vouch for as a clean solution that doesn’t hurt the environment with their rugged riding preferences and successfully meets the emission standards set by API SL.

Why Is This a Top Pick?

The formulation of this dirt bike engine oil is made using the Trizone technology and a good combination of the wet clutch. This means that while you use this oil, you can keep your engine, stable clutch performance, and gearbox all protected and in harmony to create an efficient and effortless ride on rough terrain.

Since the Castrol power 5W-40 can sustain very high temperatures in the case of both air-cooled and water-cooled engines while preventing any sort of viscosity breakdown, this can be a great choice for hot engines.

The shear-stability will make sure that you can delve into the world of speed and acceleration without giving second thoughts on if your engine can survive it.

Do you want to know what dirt bike goggle tear offs are? Here’s the page that will tell you all about them.

So if your 4 stroke dirt bike is frequently riding a lot of miles, and if you are someone who does both long-range commuting and course competitions, you won’t find a better match for shifting ease, steady engine temperatures, and the perfect clutch engagement than Castrol that improves clutch slip control. In such a way, you have to pay a high price.

5. Honda Pro GN4- Best oil for 4 Cylinder Engine

Honda Pro Honda GN4 Motor Oil - 10W40 - 1 Quart/--

Made in 1975, you would think that the honda gn4 is quite outdated to use in contemporary engines. You’re wrong, then.

Honda is continually testing and developing the GN4 to keep up with the engines of today, so you can expect A-grade superior performance from this dirt bike engine oil in terms of both viscosity stability and shear resistance.

Why Is This a Top Pick?

But what does this high quality oil mean for you? Better engine performance in heated weather (as the heat of the engine is stable) and lower friction on the ride. Who doesn’t want that?

And if you were previously having trouble dealing with the load, the higher strength of the film of the GN4, silicone additives, and noise-free transmission functionalities can battle that too! The silicone additives are assisted in maintaining the necessary lubricating film by protecting foaming.

Also, a lot of oil brands promise that they will deliver when it comes to the right transmission, stable viscosity, and on the top, ensure a smooth ride. But they hardly carry your engine through that level of promise, especially a stable viscosity.

With the GN4, you can expect all that and more since the brand itself has expertise in making perfect clutches.

What makes an enduro boot comfy? Click here for some tips on how to stay comfortable while riding.

How does it clean? It is decent enough to let you ride without a drag. In such a way, if you are on the hunt for an off-road, non-synthetic oil that also comes with a great brand value, the GN4 by Honda is the motor oil of your dreams then.

6. Kawasaki- Best 4 Cycle Engine Oil

Kawasaki Pack of 2 99969-6296 Genuine OEM K-Tech SAE 10W-40 4-Cycle Engine Oil and Pad

When people go the extra mile for you, it feels delightful. It feels equally better (if not more) when your four stroke oil also comes with an oil pad at the same cost so that you don’t have to run around looking for one that can prevent spillage on the floor, doesn’t it? That’s exactly what you get from Kawasaki here!

Why Is This a Top Pick?

One major thing that happens when you have a high RPM is that the heat buildup arises in, and around your engine due to friction to offer maximum performance and protection.

But when you use this motorcycle oil, it creates a nice and thin film around the engine that allows the rest of the components to maintain their rhythmic flow with the least friction. As a result, the consistent performance of the engine increases.

Another great thing about this engine oil is that it burns clean with ultra clean additives. Since this is devoid of additives that leave a residue, you can use it for a longer duration without seeing more accumulated dirt and dust particles coming in the way of your engine and creating setbacks in its consistent performance.

Why should you invest in dirt bike riding boots for your lower leg? Find out here.

And this benefit is also seen in the clutch and gearbox. The harder you push in your trail, the more dedicated is the service from this 4 stroke oil. So if you have a 4-stroke engine bike that needs to run clean, you know where to look! Only remember that it does not have racing additives.

7. Quicksilver- Best Oil for Small 4 Stroke Engine

Quicksilver 25W-40 Marine Engine Oil - 1 Gallon

Fan of synthetic, mineral, or semi synthetic oil? If you can’t get enough of the benefits of the semi synthetic Lucas oil or both synthetic and mineral kinds, the premium blend of Quicksilver will ensure that you have the best of worlds equally, in your 4-stroke engine dirt bike. How? With the addition of both mineral and synthetic base stocks, the perfect blend of mineral oil and castor oil creates semi synthetic oil.

Why Is This a Top Pick?

What does this mean for you? You get to protect your engine from corrosion and suffering due to excessive wear and tear (which is completely understandable given that you will be riding dirt bikes). Also, it allows your bike’s engine a good amount of viscosity retention to give maximum performance and let you ride through in the hot summer.

With 5 years of industry knowledge going into testing, developing, and improving this engine oil, you can only expect it to be of top-notch quality. So, for marine engines, this transmission oil especially packs additives that can protect your engine while keeping an eye out to outperform other oils.

Which dirt bike boots are top for you? Find out more details, and get the best fit.

Now, although this is meant to behave well in dirt bikes and marine motors, there is still one thing that you would have preferred the oil to shine in, but it doesn’t. The area is racing. But even if this isn’t fit for competitions, you can always check out Castrol’s motorcycle oil listed above!

8. Motul Synthetic- Best Oil for 4 Stroke Engine

Motul 104092 Synthetic Engine Oil

Liked how Valvoline had your back in extremely hot weather? Here’s another motorcycle oil that can keep the performance and delivery from your 4-stroke engine up and running (literally) even in the crazy hot summer days. Your engine will neither puke nor throw you off guard with the trusted performance from Motul.

Why Is This a Top Pick?

So how does Motul give you the engine response you could be proud of? With the inclusion of the Ester technology. With the help of this technology, Motul prevents sludge creation in the engine and works friction modifiers.

And without the sludge sourced from the extremely high heat, you have an engine and wet clutch function that rides a butter-smooth and prevents clutch slippage.

It prevents the breakdown of oil, saves you from sludge which is inseparable in hot weather and long-distance hauls, but what about the spillage?

You will see a spotless track even when you push your engine hard with it. The same goes for its engine performance in winter with the first-class lubrication it offers.

Even for the gearbox, Motul has something to offer. The extreme pressure formula used in making the oil protects the gearbox from giving in to extreme loads.

Have you ever wanted to take up dirt biking? Here’s what your new helmet should look like. The mips is truly one-of-a kind, with its own unique features that make it stand out among the rest.

Preventing from the excessive carbon deposits, this is for a high-performance bike needing a smooth shifting and quiet engine unless you are using it for actual racing purposes.

9. Star Brite Premium Synthetic 4-Stroke Oil

STAR BRITE Super Premium Synthetic Blend 4 Stroke Oil 10W 40 - 1 GAL (028200)

In case you wanted to look at another kind of marine engine oil after Quicksilver’s take on it, here’s another one from Star Brite. Not exactly as popular of choice as Quicksilver was, it does have to offer some great features – starting with exceeding API requirements of protection in performance!

Why Is This a Top Pick?

In what kinds of performance? In high RPM applications, that are more severe than regular dirt biking. Such oil will cover you (or your engine, really) from harsh marine conditions. This is understandably great, given that this premium and correct oil is made of both synthetic and organic blends.

You also have shear-polymer additives in the blend that increase the stability from it into the engines. Besides that, its additives also ensure that you have a clean burn and can keep sludge buildup at bay as you ride. All of this acts in favor of using it in both seasons.

In summer, sludge prevention is especially helpful. While in winter, the easy start from the blend of stocks. The lubrication allows you smoother shifting quickly that starts the engine without worrying about delays in work.

There are many kids dirt bike helmets to choose from. Which one is best for your child? Find out which features they need and want, what brands fit their personality the most comfortably or offers protection that will prevent injuries in case of an accident.

However, it would have been better if the bottle was easier to use with clear visuals on the oil content as well as the size.

10. Polaris Synthetic 4-Cycle Engine Oil

Polaris Engineered PS-4 Synthetic 4-Cycle Engine Oil, 1 Quart (Pack of 2)

The underdog in the list of favorite dirt bike oils, Polaris can give the high-end brands a run for their money with how it changes the performance of 4-stroke engines for the better.

Why Is This a Top Pick?

This full-synthetic blend is an all-season formula meant to work well with your engine without heating it, improving what you get from your dirt bike!

Remember how the YamaLube was built to go with almost every vehicle ever? Polaris has the same offering, as it can work with ATVs, snowmobiles, and dirt bikes all in one. As long as you have dirt terrain to handle, such oil flow is there to handle your dirt bike’s engine.

But there’s one thing where the Polaris has fewer contenders: it is the range of temperatures that it can deal with. Polaris can handle it all from as high as 100 degrees Fahrenheit to as low as -40 degrees Fahrenheit.

In the summer, it prevents breakdown, and in the winter, it makes starting the engine easy with the lubrication that cuts down the need for frustration!

How well do the sand front tires work? Find out here.

Since it supports a whole range of vehicles in a whole lot of temperatures, you would think or at least hope it would be able to give you a high mileage. But that is where the Polaris falls short, as the mileage isn’t exactly the best. But if that doesn’t matter, this highly protective and highly compatible bike oil is a starter!

What Are the Properties That Make a Good Quality Dirt Bike Engine Oil?

Picking a good quality dirt bike engine oil is not hard if you know what you are supposed to look at when finding them. Below is a list of features and properties that make up a good oil for dirt bikes. As long as you stick to this guide, you will be good to go!

Furthermore, the most typical oil weight for dirt bikes is 10w-40, and oil changes after a particular time are very effective. The oil changes of 4 stroke dirt bikes are required every 15 hours.

Synthetic Oil

If you frequently use your dirt bike in the hot weather or live in a hotter climate in general, you need to pick synthetic engine oil for your engine. This holds whether you have a high-performance engine or a regular engine.

Often in high heat due to oxidation reactions, sludge is created on the engines. Fully Synthetic oil prevents the sludge and lasts longer the car engines, letting your engine do the same while being clean.

You also get low friction and higher efficiency from the best synthetic motorcycle oil. Most modern bike oils are synthetic, so you don’t have to worry about finding one.

The best all around dirt bike tire is the enduro. To find out more, search “Enduro Tires” on google and read up!

Mineral Oil

Mineral oils are considerably cheaper than synthetic oils. These are the safer option for older dirt bikes that need thicker gear oil to support their engine. Preventing leaks is much easier when you have mineral oils.

This is why you will see older dirt bikers avoiding the use of synthetic oils, which tend to be thinner and cause more spillage and leakage when used in such bikes. It has a higher viscosity. But even mineral oils can be made to reduce friction and rev up your engine’s performance with the right blends.You can oil change after 15 hours.


The pricing of the engine oil you get will depend on the brand that you are aiming for.

Brands like the French giant Motul excels in making synthetic oils for cars and motorcycles; California-based Maxima that makes high-performance oils and lubricants; or the British favorite Castrol that is adept in industrial lubricants, greases, and oils will need you to pay more.

On the other hand, going for brands such as Polaris, Star Brite, or other options which aren’t yet the popular choices (but surely on their way to be) will cause you to pay less.

Most non-synthetic oils (sometimes irrespective of the brand) will be priced under 30 dollars. Above that, almost all synthetic engine oil or non-synthetic ones are labeled premium.


If you have used car oils, the additives in those are different from those that go into motorcycles. These additives ensure that the wet clutch of dirt bikes does not slip.

As a result, even in excess load under the bearable range, the bike holds up well. This enables you to make quick turns and go smoothly on jumpy roads. Anti-shear and anti-foam additives are the most common additives added to motorcycle oils.

Cleaning Agent

Any motorcycle engine oil that claims to be good or that you want to be good for your dirt bike should have cleaning agents in it. With the help of these cleaning agents, the oil helps to keep the engine cool and clean besides helping to run it.

The inclusion of a cleaning agent is particularly useful when you ride in hot climates, and you need to prevent the sludge from coming in the way of a smooth and efficient ride.

Heat Dissipation

The Ester technology you saw in the Motul engine oil on the list above is a prime example of seeking heat dissipation properties from your engine oil. So how does this help?

With the aid of esters, the heat dissipation in the engine can be controlled. The esters move the heat from harder-to-reach areas to more accessible areas on the engine that can be water-cooled or air-cooled, resulting in an extended life span of your engine.

The best tires for a dirt jump are those who can give you the traction and handling required to make it through one. Find out more details on our website here.

Frequently Asked Questions

Is there any difference between the car and motorcycle oil?

Yes. Car oils do not have to go through the extreme or complex environment of motorcycle or marine engines. In motorcycle engines, the oil is broken down with more speed which naturally creates more heat.

Since they run faster, the heat continually increases with the breakdown of the fuel. As a result, motor oil is given more protective and anti-shear, viscosity-retentive properties and elements than car oils.

If these were not added, the clutch performance would degrade. This is why motorcycles have oils specifically designed for them.

What kind of oil should I feed my 4-Stroke engine?

Depending upon what benefit you want from the oil (easy shift, quiet engine, environment-friendly, all-season support), you can pick from the Motul, Castrol, YamaLube, Motorex, Amsoil or other trusted brands and use it in your 4-stroke engine.

What is the better option between 2-Stroke and 4-Stroke dirt bikes?

If you want to ride with ease, with less fuel consumption, easy shifting, and more power output, you should go for 4-stroke dirt bikes. However, if you want easy cleaning, better speed, and a lightweight option, go for 2-stroke dirt bikes. Find out more about these bikes here.

Can I put 2-stroke engine oil in my 4-Stroke engine?

No. It wouldn’t be wise to put 2-stroke oils in 4-stroke engines, as the latter requires you to have an oil with increased viscosity retention to keep up with the extreme operating temperature of 4-stroke engines.

Which is the better option between 10w30 and 10w40?

Considering the winter season, the performance from both variants will be the same. But if you talk about summer, 10w40 has higher viscosity retention than 10w30, making the former a better choice.

What happens when you don’t change the engine oil?

Not changing the engine oil causes sludge buildup in the engine, slowing down your overall performance.

What are the different tire sizes for dirt bikes? Find your perfect match here.
What are the benefits of using Crude oil, air filter oil, and automotive oil in 4 stroke dirt bikes?

By generating heat, crude oil warm the frozen engine in colder weather and prevent engine deterioration; the automotive oil performs successfully. On the other hand, air filter oil assists in preserving the engine’s life of motor oil.

Why do some bikes have separate oil compartments?

It depends on the brand and model of the bike. Varying upon these two, you can have different engine oil compartments, which hardly affect the performance of the bike in general.

Picking The Best 4 Stroke Engine Oil for You

And that brings you to the end of the hunt! From the list, Castrol was quite an achiever with its environment and viscosity-retention features. Also, the blend of Valvoline for ease of shifting and the compatibility of Maxima to deliver well for both air-cooled and water-cooled engines was commendable.

And that brings you to the end of the hunt! From the list, Castrol was quite an achiever with its environment and viscosity-retention features. Also, the blend of Valvoline for ease of shifting and the compatibility of Maxima to deliver well for both air-cooled and water-cooled engines was commendable.

But the favorite from the list, the best 4 stroke dirt bike oil would be Motul Motorcycle engine oil that serves you in hot and cold weather with its clean-burning, zero-sludge, zero-friction, and effortless riding which is perfect for even high-performance engines that need a life extension.

And as for the rest, as long as they meet the requirements of your riding style with their finesse in features, the engine oil is yours!

You may be wondering what a dirt bike hitch carrier is. It’s an easy way to carry your bikes when you travel and it comes with everything, including locks.