10 Best Engine Oil For 4 Stroke Motorcycle (2024 Update)

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If you're a motorcycle rider, you know how important it is to maintain your bike's engine. One crucial aspect of engine maintenance is choosing the right type of oil. With so many options available, it can be overwhelming to find the best engine oil for your 4-stroke motorcycle. Here are five key points to keep in mind when looking for the right engine oil:

1. Consider the Viscosity: Choosing the right viscosity for your motorbike is important. The viscosity of the oil determines how well it will flow through the engine. Most motorcycles require an oil with a viscosity rating of 10W-40 or 20W-50.

2. Look for Synthetic Oil: Synthetic oil is designed to withstand high temperatures and has better wear protection than conventional oil. It's a great option for high-performance bikes or those ridden in extreme conditions.

3. Check the API Rating: The American Petroleum Institute (API) rating indicates the quality of the oil. Look for an API rating of SJ, SL, or SM.

4. Consider the Brand: Stick to reputable brands that specialize in motorcycle engine oil. These brands have extensive knowledge and expertise in the specific needs of motorcycle engines.

5. Follow the Manufacturer's Recommendations: Always check the owner's manual to see what type of oil is recommended by the manufacturer. Following their recommendations will help ensure your motorcycle runs smoothly and lasts longer.

By keeping these key points in mind, you can find the best engine oil for your 4-stroke motorcycle. Don't skimp on engine oil – investing in a high-quality oil will pay off in the long run by protecting your bike's engine and extending its life.

10 Best Engine Oil For 4 Stroke Motorcycle

1. Wphmoto Lifan 150cc Racing Engine For Dirt Pit Bike Motorcycle With 1n234 Gear And 4 Stroke Oil Cooling.

The WPHMOTO Lifan 150cc Engine Motor is a high-performance engine designed for XR50 CRF50 XR CRF 50 70 Dirt Pit Bike Motorcycle. It is a 4-stroke, 4-speed engine with a manual clutch and 1-N-2-3-4 gear system. The shaft size of the engine is 17mm, making it a perfect replacement or upgrade for XR50 CRF50, Kawasaki KX KLX and other most popular dirt bikes.

This engine kit comes with everything you need to get started, including the engine, starter & gear lever, manifold kit, CDI Box, and Ignition coil. The engine is easy to hook up and comes with step-by-step instructions. All you need to do is remove your existing engine and reverse the process to put the new one in.

The WPHMOTO Lifan 150cc Engine Motor offers superior performance and durability. It is oil-cooled, ensuring that it stays cool even during high-performance use. The engine is also designed to be easy to maintain, with readily available replacement parts.

The engine is engineered with precision to ensure optimal performance. It features a 1-N-2-3-4 gear system that allows for smooth shifting, ensuring that you can easily navigate through different terrains. The engine is also designed with a manual clutch that offers easy control, allowing you to quickly shift gears and maintain speed.

In conclusion, the WPHMOTO Lifan 150cc Engine Motor is an excellent choice for anyone looking to upgrade or replace their dirt bike engine. It is easy to install, offers superior performance, and is built to last. Whether you're a professional racer or a weekend enthusiast, this engine is sure to exceed your expectations.

2. Zxtdr Lifan 150cc 4-Stroke Racing Engine For Dirt Pit Bikes: 1n234 Gear, Oil Cooled, Fits Xr50 Crf50 Xr Crf 50 70 Motorcycle

The ZXTDR Lifan 150cc Engine Motor is a high-performance racing engine that is designed to replace and upgrade the engines of the most popular dirt bikes, including the XR50 CRF50, Kawasaki, and others. This 4 stroke 4 speed engine is equipped with a 1-N-2-3-4 gear manual clutch that provides smooth and efficient shifting for an enhanced riding experience.

The engine kit comes complete with all the necessary components, including a starter and gear lever, manifold kit, CDI Box, and ignition coil. This makes it easy to hook everything up and get your bike up and running in no time. Simply remove your existing engine and reverse the process to install the new one.

The Lifan 150cc Engine Motor is oil cooled, which helps to keep the engine running smoothly and efficiently even in high-performance situations. It is also designed for easy maintenance and repair, with easily accessible components and a user-friendly design.

With its high-quality construction and powerful performance, the ZXTDR Lifan 150cc Engine Motor is an excellent choice for anyone looking to upgrade their dirt bike's engine. Whether you're a seasoned racer or just looking to get more out of your bike, this engine is sure to deliver the power and performance you need to take your riding to the next level.

So if you're looking for a high-performance racing engine that's easy to install and delivers unbeatable power and performance, look no further than the ZXTDR Lifan 150cc Engine Motor.

3. Kawasaki 4-Stroke Motorcycle Engine Oil 10w40 1 Gallon K61021-302

Kawasaki 4-Stroke Motorcycle Engine Oil 10W40 1 Gallon K61021-302 is a top-quality engine oil that is designed to provide prolonged engine life by improving engine cleanliness and reducing oil volatility. It is specifically formulated for use in 4-stroke motorcycles, and it has been tested and approved by Kawasaki engineers to ensure its compatibility with Kawasaki engines.

One of the key benefits of using Kawasaki 4-Stroke Motorcycle Engine Oil is that it enhances transmission and clutch performance and dependability, leading to improved shift quality. This can be especially important for riders who demand high performance from their motorcycles, whether on the race track or on the open road.

Another important aspect of this engine oil is that it meets or exceeds the requirements of API SL, JASO MA, and JASO MA2 engine oil standards. This means that it is suitable for use in a wide range of motorcycle engines, including those that require high-performance oil with advanced friction-reducing additives.

Kawasaki 4-Stroke Motorcycle Engine Oil is sold in a package quantity of 4, making it easy to stock up on this essential motorcycle maintenance product. It is also available in a convenient 1-gallon size, which is ideal for those who want to keep their engines well-oiled without having to constantly purchase new bottles of oil.

In summary, Kawasaki 4-Stroke Motorcycle Engine Oil 10W40 1 Gallon K61021-302 is a high-quality engine oil that is designed to provide superior performance and protection for 4-stroke motorcycle engines. It is recommended for use in applications requiring API SL, JASO MA, and JASO MA2 engine oil, and it is sold in a package quantity of 4 for added convenience. If you want to ensure the longevity and performance of your motorcycle's engine, consider using Kawasaki 4-Stroke Motorcycle Engine Oil for your next oil change.

4. Jcmoto Lifan 150cc Dirt Bike Engine | 4 Stroke Oil Cooled Racing Motor With 1n234 Gear For Xr50 Crf50 Xr Crf 50 70 Motorcycle

The JCMOTO Lifan 150cc Engine Motor is a high-performance racing engine that is designed for dirt pit bikes and motorcycles. It features a 1-N-2-3-4 gear manual clutch with a 4-stroke 4-speed configuration, making it a great replacement or upgrade option for popular models such as the XR50 CRF50, Kawasaki KX KLX, and others.

The engine comes with a shaft size of 17mm and has been designed for optimal performance in racing conditions. It is oil-cooled, which helps to keep the engine running at a stable temperature even during extended periods of use. This ensures that the engine remains reliable and consistent throughout the race.

The kit includes everything you need to install the engine, including the engine itself, a starter and gear lever, manifold kit, CDI box, and ignition coil. This makes it easy to hook everything up and get the engine running in no time. The kit is designed to be a direct replacement for your existing engine, so you can simply remove your old engine and reverse the process to install the new one.

Overall, the JCMOTO Lifan 150cc Engine Motor is a great option for anyone looking to upgrade their dirt pit bike or motorcycle. With its high-performance design and easy installation process, it is sure to provide a significant boost to your racing performance.

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

Yamalube has been the go-to brand for Yamaha owners for years, and their All Purpose 4 Four Stroke Oil 10w-40 1 Gallon is no exception. This OEM factory oil is designed to provide superior performance for a wide range of vehicles, including motorcycles, ATVs, side-by-side vehicles, and scooters.

One of the key features of this oil is its performance-blend formula. This formula is designed to provide superior lubrication and protection, ensuring that your engine runs smoothly and reliably. Whether you're cruising down the highway on your motorcycle or tearing up the trails on your ATV, this oil will help keep your engine running at its best.

Another important feature of this oil is its use of mineral oil. Mineral oil is known for its stable clutch performance and strength, which helps protect the engine from wear and tear. This is especially important for off-road vehicles that are subjected to harsh conditions and heavy use.

Of course, one of the most important considerations when choosing an oil is whether it meets or exceeds industry standards. The Yamalube All Purpose 4 Four Stroke Oil 10w-40 1 Gallon meets or exceeds the JASO MA requirements, which means that it has been rigorously tested to ensure that it provides the highest level of protection and performance.

Finally, it's worth noting that this oil is a genuine OEM Yamaha product. This means that it has been designed and tested specifically for use in Yamaha vehicles, and that you can trust it to provide the best possible performance and protection. Whether you're a professional mechanic or a casual rider, you can rest assured that this oil is the real deal.

In conclusion, the Yamalube All Purpose 4 Four Stroke Oil 10w-40 1 Gallon is an excellent choice for anyone who wants to ensure that their Yamaha vehicle runs at its best. With its performance-blend formula, mineral oil, and adherence to industry standards, this oil is sure to provide the superior lubrication and protection that your engine needs to perform at its best. So if you want to keep your Yamaha running like a dream, be sure to give this oil a try.

6. Wphmoto Lifan 150cc Racing Engine Kit For Dirt Pit Bikes.

The WPHMOTO Lifan 150cc 4 Stroke Oil Cooled Racing Engine Motor Carburetor Wiring Harness Kit is a high-performance upgrade for XR50 CRF50, Kawasaki KX KLX and other popular dirt bikes. This kit includes a Lifan 150cc engine, kick starter lever, gear shift lever, intake manifold, manifold hardware kit, carburetor, air filter, CDI, ignition coil, wire harness, clutch cable, exhaust muffler, and pipe.

The Lifan 150cc engine boasts a 1-N-2-3-4 gear system with a manual clutch. It is a single-cylinder, 4 stroke 4 speed engine with a maximum power of 9kw (7500±375) and a maximum torque of 11N.M (5000±250). The bore x stroke of the engine is 56.5mm x 59mm, and the sprocket is 15T 428 Chain with a shaft size of 17mm.

This kit is an excellent replacement or upgrade for dirt bike enthusiasts looking to enhance the performance of their XR50 CRF50 or other popular dirt bikes. The package includes all the necessary components for easy installation, and the high-quality materials ensure long-lasting durability.

The kick starter lever and gear shift lever make it easy to start and switch gears, while the intake manifold and carburetor provide optimal fuel efficiency. The air filter and exhaust muffler work together to maintain excellent air quality, while the ignition coil and CDI ensure a reliable spark for optimal engine performance.

The wire harness and clutch cable are designed for easy installation, making this kit an excellent choice for DIY enthusiasts. The exhaust pipe is also included, which not only enhances the performance but also gives a stylish look to the bike.

In conclusion, the WPHMOTO Lifan 150cc 4 Stroke Oil Cooled Racing Engine Motor Carburetor Wiring Harness Kit is a high-quality upgrade for dirt bike enthusiasts looking to enhance the performance of their XR50 CRF50 or other popular dirt bikes. With its easy installation and durable components, this kit is an excellent choice for both beginners and experienced riders.

7. Castrol 06113 Power Rs 5w-40 4-Stroke Motorcycle Oil – 1 Quart, (Pack Of 6)

Castrol 06113 Power RS 5W-40 4-Stroke Motorcycle Oil is a top-of-the-line product that has been designed specifically for motorcycles. This oil is formulated with Trizone technology that provides the ultimate protection to all three critical zones of the motorcycle engine, including the engine, clutch, and gearbox. This technology ensures that the motorcycle engine is protected against wear and tear, thereby increasing its lifespan.

The Castrol 06113 Power RS 5W-40 4-Stroke Motorcycle Oil is a race-derived oil that has been designed to provide maximum engine acceleration. The oil is formulated to withstand extreme high-temperature air-cooled performance and water-cooled engine performance. This means that the oil can withstand high-temperature conditions without breaking down, ensuring that the engine remains well lubricated and protected against wear and tear.

The Castrol 06113 Power RS 5W-40 4-Stroke Motorcycle Oil is also equipped with excellent shear stability that prevents viscosity breakdown. This means that the oil maintains its viscosity even under extreme conditions, ensuring that the engine is well lubricated and protected against wear and tear. This feature also ensures that the oil lasts longer, reducing the need for frequent oil changes.

The Castrol 06113 Power RS 5W-40 4-Stroke Motorcycle Oil exceeds API SL and JASO MA-2 standards. This means that the oil has been tested and proven to meet the highest industry standards for motorcycle oils. The oil has also been tested for compatibility with catalytic converters, ensuring that it does not cause any harm to the environment.

In summary, the Castrol 06113 Power RS 5W-40 4-Stroke Motorcycle Oil is a top-of-the-line product that provides the ultimate protection to all critical zones of the motorcycle engine. The oil is formulated with Trizone technology that ensures maximum engine acceleration and can withstand extreme high-temperature air-cooled performance and water-cooled engine performance. The excellent shear stability of the oil prevents viscosity breakdown, ensuring that the engine remains well lubricated and protected against wear and tear. The oil also exceeds API SL and JASO MA-2 standards and is compatible with catalytic converters, making it an environmentally friendly choice.

8. Wphmoto Lifan 150cc Racing Engine Motor With Carburetor And Wiring Kit For Dirt Pit Bike.

The WPHMOTO Lifan 150cc 4 Stroke Oil Cooled Racing Engine Motor is a high-performance engine designed for XR50 CRF50 XR CRF 50 70 Dirt Pit Bike Motorcycles. This engine boasts a 1-N-2-3-4 gear, manual clutch, 4 stroke 4-speed, single-cylinder, and speed max power of 9kw (7500±375).

With a maximum torque of 11N.M(5000±250), the Lifan 150cc engine is a powerhouse that can handle demanding off-road terrain. The bore x stroke of this engine is 56.5mm x 59mm, while the sprocket is 15T 428 Chain, and the shaft size is 17mm.

This engine is an excellent replacement or upgrade for XR50 CRF50, Kawasaki KX KLX, and other popular dirt bikes. The WPHMOTO Lifan 150cc 4 Stroke Oil Cooled Racing Engine Motor comes with a carburetor wiring harness kit, making it easy to install and start using.

Crafted with precision engineering, this engine has been designed to deliver high performance, reliability, and durability. The oil-cooled system ensures that the engine remains cool under high-stress conditions, preventing overheating and damage.

The WPHMOTO Lifan 150cc 4 Stroke Oil Cooled Racing Engine Motor is an excellent choice for those looking to upgrade their dirt bike's performance. With its advanced features and powerful performance, this engine is designed to deliver an exceptional riding experience.

In summary, the WPHMOTO Lifan 150cc 4 Stroke Oil Cooled Racing Engine Motor is a top-of-the-line engine designed to handle the toughest off-road terrains. With its powerful performance, durability, and reliability, this engine is an excellent choice for dirt bike enthusiasts.

9. Genuine Honda Synthetic 4-Stroke Engine Oil – 12 Quarts

The New Genuine Honda HP4S 10w30 Synthetic ATV / UTV / Motorcycle / PWC 4-Stroke Engine Oil is a high-performance, full synthetic oil designed to provide the ultimate in engine protection, durability, and performance for your high-performance machine. This product is a genuine Honda product, and its OEM part number is 08C35-SYN-1030M.

Honda's HP4S Full Synthetic Motorcycle Oil is engineered to meet the demands of severe duty and racing applications, making it an ideal choice for anyone who wants the best possible performance from their machine. The exclusive formulations used in this oil provide maximum engine wear protection during the critical cold-start period, as well as during high rpm use.

This product comes in a case of 12 quarts, making it ideal for those who want to stock up on engine oil or for those who need to perform regular oil changes on their machine. The high-quality synthetic formula used in this oil ensures that it provides superior engine protection and performance, even in the most demanding conditions.

If you're not sure which type and viscosity of oil to use in your particular vehicle, be sure to consult your owner's manual for the recommended specifications. Honda's HP4S Full Synthetic Motorcycle Oil is designed to meet or exceed the requirements of most modern engines, making it a great choice for anyone who wants to ensure that their machine is running at its best.

In conclusion, the New Genuine Honda HP4S 10w30 Synthetic ATV / UTV / Motorcycle / PWC 4-Stroke Engine Oil is an excellent choice for anyone who wants the best possible engine protection, durability, and performance from their high-performance machine. Its exclusive formulations ensure that it provides maximum engine wear protection, even in the most demanding conditions, and its high-quality synthetic formula ensures that it provides superior engine protection and performance.

10. 140cc 4-Stroke Racing Engine Motor Kit With Oil Cooler And Exhaust For Dirt Pit Bike Motorcycle.

The WPHMOTO Lifan 140cc 4-Stroke Racing Engine Motor Oil Cooler Cooling Radiator Exhaust Muffler Pipe Kit is a high-performance engine designed for dirt pit bike motorcycles. This engine comes equipped with a manual clutch, N-1-2-3-4 Gear, and a 4-stroke 4-speed design. The shaft size of this engine is 17mm, making it a replacement or upgrade option for XR50 CRF50, Kawasaki KX KLX, and other popular dirt bikes.

With a maximum power output of 8kw (7500±375) and a maximum torque output of 9.5N.M (5000±250), the WPHMOTO Lifan 140cc engine is ideal for racing and off-road applications. The engine comes with a kick-starter lever, gear shift lever, intake manifold, manifold hardware kit, carburetor, air filter, wire harness, CDI, ignition coil, radiator, clutch cable, exhaust muffler pipe kit, and other necessary hardware.

Installing the WPHMOTO Lifan 140cc engine is simple and straightforward. All that is required is to remove the existing engine and reverse the process to install the new one. This engine is easy to hook up, making it a great choice for those who want to upgrade their dirt pit bike without the need for professional installation.

The WPHMOTO Lifan 140cc engine is designed to provide maximum performance and reliability. The engine is built with high-quality materials, and the cooling radiator ensures that the engine stays cool during operation. The exhaust muffler pipe kit also helps to reduce noise levels, making it easier to ride in noise-sensitive areas.

Overall, the WPHMOTO Lifan 140cc 4-Stroke Racing Engine Motor Oil Cooler Cooling Radiator Exhaust Muffler Pipe Kit is an excellent choice for those looking to upgrade their dirt pit bike. Its high-performance design, easy installation, and reliable operation make it a popular choice among dirt bike enthusiasts.

Best Engine Oil For 4 Stroke Motorcycle FAQs

Can synthetic oil be used in a 4 stroke motorcycle engine?

Yes, synthetic oil can be used in a 4-stroke motorcycle engine. In fact, synthetic oil is often recommended for high-performance engines, including those found in motorcycles. Synthetic oil is designed to provide better lubrication and protection than conventional oil, which can help extend the life of the engine and improve performance. However, it's important to choose a synthetic oil that is specifically formulated for use in motorcycles, as these oils are designed to meet the unique needs of these engines. Additionally, it's important to follow the manufacturer's recommendations for oil viscosity and change intervals, as these can vary depending on the type of motorcycle and how it's used. Overall, using synthetic oil can be a good choice for motorcycle owners who want to get the most out of their engines.

How does the use of high-quality engine oil affect the performance of a 4 stroke motorcycle?

Using high-quality engine oil in a 4 stroke motorcycle can significantly improve its performance. Firstly, high-quality engine oil provides better lubrication, reducing friction between the engine components, and preventing wear and tear. This, in turn, helps to improve the engine's efficiency, leading to better acceleration, smoother operation, and improved fuel economy.

Secondly, high-quality engine oil can also help to keep the engine clean by reducing the buildup of deposits, sludge, and other contaminants. This can help to prevent clogging of the oil passages and filters, which can lead to reduced oil flow and overheating.

Lastly, high-quality engine oil also provides better protection against corrosion and rust, which can be caused by moisture and other contaminants in the engine. This can help to extend the lifespan of the engine, reducing the need for costly repairs and maintenance. Overall, using high-quality engine oil is a simple yet effective way to improve the performance and reliability of a 4 stroke motorcycle.

How often should engine oil be changed in a 4 stroke motorcycle?

As a general rule, engine oil should be changed in a 4-stroke motorcycle every 3,000 to 5,000 miles or every six months, whichever comes first. However, this can vary depending on the manufacturer's recommendations and the type of oil used. Some motorcycle manufacturers recommend changing the oil every 2,000 miles, while others say you can go up to 7,500 miles between oil changes.

Factors that can affect how often you need to change your oil in a 4-stroke motorcycle include how often you ride, the conditions in which you ride, and the type of oil you use. If you ride frequently or in harsh conditions, such as extreme heat or cold, you may need to change your oil more often. Additionally, using synthetic or semi-synthetic oils can extend the life of your oil and allow you to go longer between changes.

It's important to follow your manufacturer's recommendations for oil changes to keep your motorcycle in top condition and ensure its longevity.

What are the consequences of using the wrong type of engine oil in a 4 stroke motorcycle?

Using the wrong type of engine oil in a 4 stroke motorcycle can have serious consequences. The engine oil is responsible for lubricating the engine, reducing friction between the moving parts, and removing heat from the engine. If the wrong type of oil is used, it can cause the engine to overheat, resulting in damage to the engine components. This can lead to decreased engine performance, reduced lifespan of the engine, and ultimately, engine failure. Additionally, using the wrong oil can affect the bike's clutch performance, causing it to slip or fail prematurely. It can also negatively impact the bike's fuel economy and emissions. Therefore, it is essential to use the recommended oil type specified by the manufacturer to ensure optimal performance and longevity of the motorcycle engine.

What is the recommended viscosity for engine oil in a 4 stroke motorcycle?

The recommended viscosity for engine oil in a 4 stroke motorcycle depends on the operating temperature range of the engine. Generally, motorcycle manufacturers recommend using oils with a viscosity grade of 10W-40 or 20W-50 for most types of motorcycles. The first number (10W or 20W) refers to the oil's viscosity at startup or low temperatures, while the second number (40 or 50) indicates its viscosity at high temperatures.

It is important to note that using the right viscosity oil for your motorcycle is crucial for optimal engine performance and protection. Using an oil with a viscosity that is too low can cause excessive wear and tear, while using an oil with a viscosity that is too high can lead to poor lubrication and increased engine stress.

Therefore, it is always best to consult your motorcycle manufacturer's recommendations and choose an oil that meets the specifications for your specific model and operating conditions. Regular oil changes according to the manufacturer's recommendations are also crucial for ensuring the longevity and reliability of your motorcycle's engine.

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