The 5 Best Motorcycle Engine Oils of 2021


Are you a proud owner of the best brand of motorcycles? do you want to maintain your vehicle in the best and the safest way possible? Then this guide is for you. We are going to tell you why the motorcycle engine oil is important and why you should be oiling your bike and replacing it as often as necessary.

Using the best quality motorcycle engine oil and changing them as frequently as mandated are the best ways to gift your motorbike a prolonged life. By making use of high-quality oils, you can also decrease your trips to a professional garage every time. Let us give you the glimpse of the best motorcycle engine oils here and how best you should choose them for your bike’s benefit


Best Motorcycle Engine Oils

Quick Answer: The 5 Best Motorcycle Engine Oils – [2021]

  1. Shell Rotella T6 Full Synthetic 5W-40 Diesel Engine Oil
  2. Castrol 06112 POWER 1 4T 10W-40 Synthetic Motorcycle Oil
  3. Motul 7100 4T Fully Synthetic Ester 20W-50 API SN Engine Oil
  4. Honda GN4 10W-30 Motorcycle Oil
  5. Mobil 1 20W-50 V-Twin Synthetic Motocycle Motor Oil

Best Motorcycle Engine Oils Reviews

#1. Shell Rotella T6 Full Synthetic 5W-40 Diesel Engine Oil


Shell Rotella Engine Oil At a Glance:
  • Compatible with exhaust emissions control systems
  • Best for extreme operating temperatures
  • Helps with fuel economy
  • Improved wear performance
  • Best deposit control
  • Best heat resistance
The Shell Rotella Motorcycle engine oils are proven to render the best fuel economy, without compromising on the engine durability. It has the best wear performance and offers the best level of protection against the harmful engine wear in comparison with other engine oils.

Its advanced multifunctional additives, along with their synthetic base provides and enhanced level of protection for the engine against dirt, soot, and other potential contaminants.

The engine oil offers the best compatibility with the emission systems and its low ash formulation helps in blocking the poisoning exhaust. It thus helps in maintaining engine fuel efficiency and emission compliance.

Its improved heat resistance helps in the continuous protection of the engine between services. Finally, this heavy-duty engine oil resists viscosity loss through sheer. It thus maintains optional pressure in the heavy-duty motorcycle engine.

#2. Castrol 06112 POWER 1 4T 10W-40 Synthetic Motorcycle Oil


Castrol Synthetic Motorcycle Oil At a Glance:
  • Protects engine, clutch, and gearbox
  • Formulated with tri-zone technology
  • Helps in maximum engine acceleration
  • High temperatures air-cooled performance
  • Water-cooled engine performance
  • Excellent sheer stability
  • Prevents viscosity breakdown
The Castrol Power 4T features a power release formula that has been specifically designed for bikers who love to ride. This engine oil is an advanced and synthetic premium quality product that is meant exclusively for four-stroke motorcycles.

It has been proven to deliver superior acceleration at the touch of the throttle. It flows pretty fast and mitigates the internal engine friction. With this engine oil, bikers can definitely experience the ultimate performance with race-driven technology.

Castrol has been the pioneer of motorsports racing and lubricant innovations for about 120 years. The brand is also known for its high-performance lubricants, 4T and 2T engine oils, and special oil that suit the needs of most modern bikes. Its proven additives will protect the hard-working components of the bike while protecting the critical zones of the engine simultaneously.

#3. Motul 7100 4T Fully Synthetic Ester 20W-50 API SN Engine Oil


Motul 4T Fully Synthetic Ester Engine Oil At a Glance:
  • Compatible with all high-end motorcycles
  • 100% synthetic 4-stroke engine oil
  • Less oil consumption
  • Less internal friction in the engine
  • Extreme pressure performance
  • Viscosity is 20W- 50
  • Helps with an optimal clutch performance
  • High-temperature deposit protection
This synthetic four-stroke lubricant engine oil caters to the lubrication needs of the two-cylinder engines. It helps with excellent shear resistance and smooth shifting of the gears. It also meets all quality specifications for optimal wet clutch performance.

This engine oil also best suits the catalytic converters. Based on its viscosity grade, it is best recommended for big bore engines thumpers, twins, and liquid-cooled engines. It is also suitable for catalytic converters.

This is a synthetic lubricant engine oil that is based on the Ester technology. It helps with the best and the most optimal clutch performance at the start-up, acceleration and also at full speed.

Its API SN also helps with high-temperature deposit protection for a more stringent sludge control. Its design includes the best synergy for less oil consumption, less engine internal friction, and more power through extreme pressure performance.

#4. Honda GN4 10W-30 Motorcycle Oil


Honda GN4 10W-30 Motorcycle Oil At a Glance:
  • Authorized for Hondo motorcycles
  • Viscosity rating is 10W- 30
  • GN 4-stroke motor engine oil
  • Best additives to prevent dirt in engines
  • Best shear resistance and viscosity
  • Matches the requirements of new-age engine technology
The GN-4 motorcycle oil is a standard engine oil for motorcycles from Honda, which has been in the business of lubricating engines since 1975.  Oil is the product of high-quality base stocks along with a unique additive package so as to meet the unique requirements of motorcycles and the ATV Engines.

This product has undergone a series of testing and development processes so as to render the best shear resistance, cleanliness, and viscosity for the engine. No doubt it matches all the requirements of new-age engines and is capable of adapting to all drive situations.

It is important to use this oil on air-cooled Honda engines for optimal results. It is also important to follow all recommendations from manufacturers on how frequently you should be changing the engine oil.

With continuous use of this engine oil, you will not complain about clutch issues and will benefit from a smooth shifting and a quiet engine. Though it costs a little more for synthetic oil, its ability to help the bike shift smoother will cover its charges.

#5. Mobil 1 20W-50 V-Twin Synthetic Motocycle Motor Oil


Mobil 1 V-Twin Synthetic Motocycle Motor Oil At a Glance:
  • Scientifically engineered to meet the unique needs of motorcycles
  • Synthetic motorcycle engine oil
  • Viscosity level is 20W-50
  • Handles extreme riding conditions
  • Withstands prolong idling time
  • Offers the best resistance against friction
  • Meets the unique needs of motorcycles
The Mobil Twin 20W-50 motorcycle engine oil is recommended for motorcycles that demand the use of 20W- 50 engine oil. It performs pretty well with engines that are designed with a common transmission lubrication system.

The oil works also for motorcycles that have a separate engine lubrication system from the engine transmission system. It also offers the best friction characteristics that are mandatory for wet clutch engine transmission systems. The oil exceeds the requirements of the API service categories and has undergone a series of tests both in the laboratory and in the field.

The formulations of the oil meet the requirements of engines as they follow the recommendations of a proven technology at the manufacturing level.

It will protect the bike even at extreme conditions such as high-speed operation, extended usage, prolonged idling in traffic, etc. its proven synthetic and scientific technology is capable of withstanding the extreme heat that is been produced by the engines and also the toughest riding conditions.

 Buyer’s Guide for Best Motorcycle Engine Oils


General Types of Motorcycle Engine Oils:

In order to choose the right type of engine oil for your bike, it is mandatory to know the broad types of engine oils available. There are three major types of oils to help your quest.

  1. Mineral oils: These are the basic forms of Engine oils available for your motorbike. These are ideal for bikes that have a smaller engine capacity and thus do not mandate much of mechanical pressure while running. These oils are also generally being used by new bike owners as they render good protection for the engine, in the first few kilometers on road. They are the best and the most affordable option available, but it is important that you keep changing the engine oil often as they do not last pretty long.
  2. Synthetic oils: Unlike the mineral oils, these synthetic engine oils are completely artificial. They do not comprise of any natural products. For those who have a high-performance bike, that gets under pressure on a regular basis, then these oils are the best choice. Classical examples of vehicles that make use of these oils are the motorcycle bikes and racing bikes. These oils do not degrade quickly and have a pretty long life cycle.
  3. Semi-synthetic oils: These oils offer the best balance between mineral oil and synthetic oils. These oils are best for bikes with smaller capacity and engines that are not under too much stress. They are better for bikes that are meant for a daily commute and not a very serious race every time. Most people use these oils after their bikes have taken off by making use of the mineral oils. Their price is slightly heavier than mineral oils.

Benefits of Using a Motorcycle Oil:

There are tremendous benefits of replacing the engine oil on your motorbike. This is because the oil keeps all the important elements of the machine working as they should. The engine oils ensure that the bike experiences a long lifespan and its performance will remain strong all through its life. The best benefits of feeding your engine with these oils are as follows.

  • Best Motorcycle Engine Oils
  • Keeps the engine cool
  • Cleanses the engine
  • Helps in elongating the engine life
  • Improves the performance and efficiency of the engine

It helps To Lubricate The Engine:

This is perhaps the main and the ultimate function of an engine oil. It ensures enough lubrication to all the engine parts and helps in reducing friction and wear. They lubricate any two moving parts in the engine and covers them with a thick film. The lubrication system in the engine helps with a steady flow of oil through all its parts enhancing its life and efficacy.

Keeps The Engine Cool:

Engine oil carries away the heat from the parts of the engine. When the engine gets switched off, the oil returns to the oil pan where it gets cooled down.

Cleanses The Engine:

The engine oil helps in cleaning the engine as it consists of two basic ingredients, base oil, and the additive. The additives offer additional engine protection through a thorough cleaning process and the base oil helps with lubrication. The best motorcycle engine oil helps to clean up all the engine components of the vehicle, it comes in contact with.  The additives are capable of cleaning all the carbon formations that accumulate on the engine parts.

Helps in Elongating The Engine Life:

The engine oils will definitely help in elongating the life of the engine as a well-maintained engine lasts longer than an engine that is not. Use them regularly to prolong the life of the engine as it prevents the buildup of sludge and keeps the internal parts very well lubricated and clean.

Improves The Performance and Efficiency of The Engine:

As the motorcycle oil helps in keeping the engine clean, your bike will offer the best fuel efficiency. When the engine is clean and running smooth, it will maximize the mechanical output of the engine.


Motorcycle engine oil FAQs:

Can I use car oil for my motorcycle?

No. you should not use the same oil for your car and your motorcycle as the engines of both these vehicles are different. You will eventually end up damaging the bike engine, oils for the car have friction modifiers to help them run smoother and will not fit your motorcycle engine.

How frequently should I be changing the engine oil?

You should be changing it frequently, but how frequently depends on the extent of your riding and the type of oil you use. Mineral engine oils require frequent replacement than synthetic oils.

What is the shelf life of motorcycle oil?

The shelf life depends on the brand and is clearly given on the label. Never use old oil that has been sitting on your garage shelf for a few years. This will end up ruining the engine. Also, the general rule of thumb is that more complicated the oil formulation, shorter is the shelf life of the oil.


How Should You Choose The Engine Oil For Your Motorcycle


Before settling in for particular engine oil, one has to think of a few important considerations to end up with the right choice.  One important point is the type of motorcycle oil, which we have already discussed. The other points are as follows,

  • Compatibility
  • Viscosity
  • Longevity
  • Additives and cleaning capacities
  • Positive feedback
  • Budget
  • Oil Grade


Check the compatibility of your motorbike engine with the type of oil you are planning to use. For instance, if your engine is capable of handling only mineral engine oil, but you feed it with synthetic, then this could result in an engine oil leak, which is not a good thing for your motorcycle.


Viscosity is the measure of the thickness of the oil or the speed at which the oil flows. If the oil has a lower level of viscosity, it flows free and faster. If you use a very diluted oil, then it will result in the metal to metal contact in the engine and eventually result in engine degradation.


Invest in a product that has a decent shelf life. You don’t want to change the engine oil multiple time, do you? Products with a better quality tend to have a longer shelf life, so make your mind before making a purchase.

Additives and Cleaning Capacities:

Additives work by removing the debris and the acid in the engine, along with rendering a cooling and lubricating effect on the engine. The engine is capable of accumulating a lot of debris and gunk over time and it is tough to clean them manually unless you take the engine out.

So use good oil to clean the engine without wasting much time. The wrong type of oil, on the other hand, can increase friction in the oil and result in shorter engine life.

Positive Feedback:

If you have zero ideas about your motorcycle engine oil, then the best way is to go through its online feedback and customer reviews. Read the opinions of others on the product, preferably those who have the same model bike as yours, and make a decisive opinion of the product.


Though cost should not be the only option that decides on the product you buy, it is also an important factor to consider. An oil with a heavy budget should justify its performance. If not, there is no point in spending so much on the engine oil. Make sure if the product you are buying comes as multi-packs or a single unit.

You will be able to save better on multi-packs than single units. Also, some of them are available as complete oil change kits, thus you will be entitled to other components that you would require to change the oil, apart from the oil itself.

Oil Grade:

This is the most important factor to consider before buying the engine oil as it hints the user on the temperature range of the oil and its level of viscosity to render effective lubrication. For example, 5W- 40 oil, 5 stands for the viscosity range, W stands for winter, and 40 is the viscosity grade for high temperatures. Thus those who live and drive in colder areas should buy oil with a W level.


Final Words:

We hope you would have understood the importance and benefits of changing your motorcycle oil frequently, and how you should choose the product to benefit your motorcycle. We hope you pick the best product for your vehicle for its long life and for a tension-free riding.


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