Best Motorcycle Oil For 2021 – Reviews And Buying Guide

Looking for the best motorcycle oil? Then you are in the right place. The oil you use in your engine is your bike’s lifeblood. As such, it provides critical cooling and lubrication for your motorcycle’s internal combustion.

Further, both conventional and synthetic engine oils serve to prevent corrosion, keep the internal components clean, and improve your motorcycle’s overall performance. Since bikes tend to operate at high temperatures and RPMs – especially in comparison to trucks and cars – it only makes sense that you ought to use oil that was specially made for bikes. Read on to learn more about the best motorcycle oils:

Image Name Editor's Rating Price
Castrol 06112 Power1 10W-40 Synthetic 4T Motorcycle Oil
HONDA 08C35-A141L01 Honda Pro GN4 Motor Oil
Yamalube All Purpose 4 Four Stroke Oil
Royal Purple 01316 Max Cycle 20W-50 High Performance Synthetic Motorcycle Oil
Mobil 1 96936 20W-50 V-Twin Synthetic Motocycle Motor Oil

**Below, you’ll find our more detailed reviews, but you can also click the links above to see current prices or read customer reviews

Best Motorcycle Oil Reviews:

1. Castrol 06112 Power1 10W-40 Synthetic 4T Motorcycle Oil – 1 Quart Bottle, (Pack of 6)


  • Works perfectly even on motorcycles with a wet clutch
  • The Castrol Power1 10W40 Synthetic Motorcycle Oil is well priced
  • It has been designed to cool down your engine all the while lubricating it
  • It will provide you with faster acceleration


  • However, you should expect some transmission resistance with this bike oil
  • It also engenders slight difficulty with the clutches and gear after an extended period of use
  • You should never use the Castrol Power1 10W40 Synthetic Motorcycle Oil with classics and old motorbikes

2. HONDA 08C35-A141L01 Honda Pro GN4 Motor Oil, 10W40, 1 gal


Some of the features making the Honda Pro GN4 Motor Oil rank among the best motorcycle oils include:

  • Non-synthetic, this oil is rated highly for performance
  • It is quite affordable: at half as much as a top-rated synthetic blend
  • This 10W30 engine oil is quite versatile for all bike engines
  • It will keep your motorcycle engine running well for a long time


  • You will need to change it at intervals as recommended by the manufacturer
  • It isn’t quite as slippery as you might expect
  • It doesn’t provide the same level of protection as synthetic oiI

3. Yamalube All Purpose 4 Four Stroke Oil 10w-40 1 Gallon


  • The Yamalube All Purpose Oil provides excellent engine performance
  • It is designed for versatile use in bikes, ATVs, scooters, and side-by-side vehicles
  • It will provide stable clutch performance
  • It is effective enough to protect your engine from the wear and tear that comes with daily use
  • It provides superior properties, anti-friction capabilities, ultra-clean additives, and a top quality mineral base
  • It meets and even exceeds the highest JASO MA requirements
  • It ensures proper performance even if you have a wet clutch
  • It works perfectly and is a good value bike oiI


  • The Yamalube All Purpose Oil smells poisonous; however, this is the natural smell you should expect from all the best motorcycle oils, so it shouldn’t bother you

4. Royal Purple 01316 Max Cycle 20W-50 High Performance Synthetic Motorcycle Oil – 1 qt


  • It ranks among the highest quality conventional synthetic oils on the market
  • It is one of the more affordable high-performance oils you can find today
  • Royal Purple Max Cycle 20W50 Synthetic Motorcycle Oil is refined for improving bike transmissions and motors
  • It is best for use in fluid-cooled and air-cooled 4-cycle motors
  • It works well even with wet-grasp transmissions
  • It will prevent wear and tear on your bike


  • Although its price might seem cheap, it is quite high because there are more affordable brands among the best motorcycle oils in this guide
5. Mobil 1 96936 20W-50 V-Twin Synthetic Motocycle Motor Oil – 1 Quart (Pack of 6)


  • The Mobil 1 Synthetic Motorcycle Oil provides excellent engine lubrication
  • It comes at a decent price
  • This is a high quality and fully synthetic oil with none of the conventional mixes you might expect from other brands
  • It runs clean, is safe, and will keep the wear and tear on your engine at a bare minimum


  • However, you need to change the Mobil 1 Synthetic Motorcycle Oil more often than most of the other purely synthetic bike oils
  • It burns fast especially if you have wet clutches
  • Some buyers have noticed wear and tear on the internal clutch after using this motorcycle oil over extended periods of time

How To Pick The Best Motorcycle Oil

There are so many bike oil reviews out there that you can quickly become baffled. To ensure that you don’t get swayed away by strong sellers and advertising tactics, you should do your research. This way, you will be well informed before making the final buying decision.

That said, the compliant standards, grade, and material of motorcycle oil mark its quality and category type. These features also determine the type of bike you can use the oil inside.

To make the right decision; therefore, it is imperative that you check every technical specification. You should also pick the motor oil that is best suited for your bike and riding needs. Depending on how the oil was produced, the following are the main categories of motorcycle oils:

1. Mineral Oil

Mineral oils are made using petroleum by-products. They were the first types of oils in the industry before synthetic lubricants started being sold. Today, this kind of oil still has its benefits – such as the fact that they are the best options for vintage and old bikes, small capacity engines, and brand new bikes before easing the new engine into synthetic lubricants.

That said, even the best motorcycle oils in this category tend to burn faster and have to get changed on a regular basis. However, they do provide better protection and are pretty affordable.

2. Semi-Synthetic Oil

The evolution of the bike engine created a need for high-performance motorcycle oils. Today, synthetic oils last longer, attract tons of active motorcycle oil reviews and are effective even for high-performance engines.

If you have a medium weight ride in the 125 to 180 cc range, then you might want to reach out for synthetic motor oils. These oils also work well for final engine run in stages.

Semi-synthetics are also effective because they provide the ideal chemical balance as well as the protection coming from mineral oils combined with the performance that synthetic oil provides.

3. Synthetic Oil

Most synthetic motorcycle oils are factory-made and based on polymers. Entirely artificial, these oils are not natural in any way. Therefore, they don’t tend to disintegrate – which gives them a longer shelf life.

That said, these types of oils are the best for use in stressful conditions and when you need your bike to be at its ultimate performance. After your bike’s odometer starts reading in the thousands of kilometers, it is highly likely that your mechanic will recommend that you switch to full synthetic motorcycle oils.

After the engine settles down, it will start performing better, and you’ll enjoy improved run-in time. At this point, you will be best advised to start on synthetic motorcycle oil to boost your bike’s performance further.

Another thing to note about synthetic oils is that they will ensure that your engine, clutch, and gear are well lubricated and continue working smoothly and without vibrations.

Factors To Consider While Buying The Motorcycle Oil

Apart from the make of the oil, there are many other features you need to think about when you are out shopping for the best motorcycle oil. Consider the following:

a) Grade

Although you might not be an expert at motorcycle oils, you need to understand such technical specifications as the grading system of engine oils. With this knowledge, you will be better placed to decide on the best oil for your bike – especially if you’ve read many reviews of different oils.

For instance, alongside the motorcycle oil, you’ll see a number and a W – such as 10W40, 20W50, and so on. This number-word combination denotes the oil grading – which you will come to understand better after you’ve gone through enough reviews.

A good example is 20W50. The W, in this case, refers to winter while the 20 refers to the low-temperature count and the 50 stands for the suitability of the oil in high temperatures.

To this end, if you live in a cold climate, then the number right before the W should be as small as humanly possible. Only by using such oils will you be able to ensure that the oil retains its viscosity even at low temperatures.

b) Compliant Standards

Before you buy any oil because you think it is the best motorcycle oil, you need to read the standards that have been recommended by the bike’s manufacturer. To this end, most bike manuals recommend JASO, SAE, and API certifications as the actual marks of quality where bike oils are concerned.

c) Motorcycle

The oil you end up buying should depend entirely on the motorcycle type you have, as well as the conditions you will be riding in. As far as possible, your bike should be the primary determinant of the category grading you pick.

For instance, if you have an American cruiser or a sports bike, then the 20W50 grading might prove to be the best. However, if you ride an imported cruiser, then you might want to reach out for a 10W40.

On the other hand, if you ride a classic, your best bet would be to stick with mineral oils. A good example would be an old Harley, which would require reliable weight lubrication. With such a bike, 50W would work well.

d) Viscosity

Viscosity refers to the thickness of your motorcycle oil. After reading the manual from your bike’s manufacturer, you will be better placed to understand the different recommendations for different times of the year.

Over and above everything else, you should never reach out for the cheapest motorcycle oil. You really cannot afford to comprise on quality where the health, lubrication, and wellbeing of your bike is concerned.

Final Verdict

There you have it – the best motorcycle oils for 2019. Each of these options is unique in its way. However, I would recommend that Castrol 06112 Power1 10W-40 Synthetic 4T Motorcycle Oil – 1 Quart Bottle, (Pack of 6). It comes with great features, is perfectly priced, and deemed usable over the long term by most riders.

As you go about looking for the best motorcycle oils, therefore, you might want to consider giving any of the above a try. As long as the oil you choose meets the user instructions from your bike’s manufacturer, is affordable, and has sterling reviews online and from mechanics, then you should pick it.

So, how do you decide which is the best motorcycle oil? What sets these different engine oils apart? How can you ensure that you always pick the best, most affordable option in the market? The following sections will help you answer these questions, and more:

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