Which 20w40 motorcycle oil is most important to you? Thanks for congratulating me! Let us do all the work for you so you don’t have to read through a thousand reviews.

The best 20w40 motorcycle oil market is flooded with so many options that it is likely you will have trouble narrowing it down. These are the top ten search terms in 2021. A lot of time and effort went into compiling this list. You’re about to learn a lot!

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10 Best 20w40 motorcycle oil Reviews in 2021

Bestseller No. 1
Victory Motorcycle Factory OEM 20W40 Engine Oil CASE of (12) 32oz Quarts 2877474
  • SKU: 2877474x12
  • Sold Each
  • Please verify your own fitment
Bestseller No. 2
Spectro L.S424 Premium Motorcycle Petroleum 4T - 20W40-1lt. - 12/Case
  • Highest quality base oils
  • Superior anti-wear additives
  • Exceptional lubrication and protection
  • Reduce thinning in common sump systems
  • Exceeds manufactures warranty
Bestseller No. 3
Klotz American V-Twin Victory Synthetic Engine Oil, 20W/40, 32 ounce quart
  • Recommended for Victory and Indian motorcycle engines
  • Certified warranty compliant: API-SL-SM service
  • Custom formulated for the v-twin air-cooled engines
  • Reduces engine temperature and detonation
  • High temperature film strength improves anti-wear protection
Bestseller No. 5
Victory Motorcycles Semi-Synthetic 20W-40 Engine Oil 1 Quart
  • SKU: 2877474
  • Sold Each
  • Please verify your own fitment
Bestseller No. 6
Indian Motorcycle New OEM 20W-40 Motorcycle Engine Oil, Quart, 2880012
  • Indian Motorcycle?� Engineering ApprovedEnhanced clutch wear protection
  • Additional rust and corrosion additives
  • Enhanced clutch wear protection
  • Catalytic converter friendly
Bestseller No. 7
Spectro L.SG424 Golden 4 Semi-Synthetic 20w40, 1 Liter
  • Spectro Specializes in Motorcycle Oils and Lubricants for over 50 Years
  • Premium Quality Synthetic and Petroleum batch blended to perfection
  • Smoother Shifting and higher stability
  • Higher Shear Stability & Prolongs Engine and Transmission life
  • Exceeds all known manufacturers' warranty A.P.I SL/JASO MA/MA2
Bestseller No. 8
Ravenol J1V1005-004 20W-40 4-Stroke Motorcycle Oil 4-T Mineral JASO MA/MA2 API SM (4 Liter)
  • Please see Product Description regarding the California Proposition 65 Warning
  • Confirmed Quality Approval from JASO MA2 T903:2006 and M049RAV123 quality standards as well as meeting API SM and JASO MA specifications
  • Compatiable for use with 4-stroke motorcycle, ATV and UTV engines with wet clutches gs
  • Excellent protection and optimum lubrication under all operating conditions and temperatures including racing conditions
  • Practiced and tested in all propular on and offroad Motorcycle, ATV and UTV 4-stroke engine applications
Bestseller No. 9
Yamalube All Purpose 4 Four Stroke Oil 20w-50 1 Gallon
  • Yamaha OEM Factory Oil
  • All Purpose 4 Four Stroke Oil 20w-50
  • 1 Gallon
  • Meets or Exceeds the JASO MA Requirements
Bestseller No. 10
Victory Motorcycle Oil Change Kit 2879600
  • SKU: 2879600
  • Sold Each
  • Please verify your own fitment

Benefits of Motorcycle Oil

Motorcycle Oil

Lubricate your engine

In order to minimize friction and wear on all engine parts, engine oil provides sufficient lubrication. Two moving parts in a motorcycle engine are lubricated by motorcycle oil. The oil creates a slick film between the moving parts. The lubrication system must ensure that oil continuously flows to all parts of an engine in order to provide optimal performance.

Cool your engine

Heat is transferred from lubricated parts to engine oil. Oil returns to the oil pan when the engine is turned off. Oil in an oil pan will be cooled by your motorcycle engine oil when it is using the best motorcycle oil. Your motorcycle engine oil must not exceed its flash point.

Clean your engine

There are two basic components in engine oil: additives and base oil. In addition to providing additional engine protection, the additives clean the engine, while the base oils provide lubrication. The components in a motorcycle engine are cleaned by the oil itself. Carbon formations accumulated on engine parts are effectively removed by the additives.

Improve efficiency and performance

The motor of your bike runs as efficiently as possible with motorcycle oil, which helps keep your engine clean. The mechanical output of your engine is maximized when your engine is clean and running smoothly.

Elongate engine life

Keeping an engine in good shape can prolong its life. Making sure to use good engine oil on a regular basis can increase engine life. By keeping internal parts lubricated, motor oil minimizes sludge accumulation.

Types of Motorcycle Oil


Chemical additives are added to mineral oils to neutralize acids and make them more stable. Also, some companies customize their products with frictional modifiers to boost lubrication so you don’t run out of product. If you are using a new bike, mineral oils are a great choice. For the first few miles on your bike, mineral oils protect the engine well. Furthermore, if your engine is small in size, you should consider using this type of oil.


Pure crude oil is an essential additive to synthetic oil. Technology has progressed and improved synthetic oils over time. Because synthetic oils have a lower viscosity, they reduce internal friction and make motorcycle engine parts move more smoothly. Synthetic oils are expensive, but for protection and long life, they may be worth the cost.


Mineral and synthetic oils are the main ingredients in semi-synthetic oil, as the name implies. Motorbikes that are designed for high performance require synthetic oil, whereas conventional or mineral oil keeps the engine clean and running smoothly for longer. Oils formulated for medium-sized engines with displacements between 125-180 cc should be semi-synthetic.

Key Features


You can determine the viscosity of your engine’s oil by its flow rate. Oil with a low viscosity flows easily and rapidly. The viscosity of high-viscosity oil makes it flow more slowly. 10W-30 is an example of an oil rating. A 10W viscosity corresponds to the cold SAE viscosity, whereas a 30 is shown for the hot SAE viscosity. Your engine could suffer severe damage from metal-on-metal grinding if you utilize the wrong viscosity.


Acidity in motorcycle engine oil can be neutralized with the addition of additives. These substances lubricate your engine and keep it cool. A motorcycle engine that isn’t lubricated properly can create more friction and shorten its lifespan.

Other Considerations

Compliance Standards

Motorbike oil with a good rating and a mark given by the manufacturer will have a mark on the body. The bodies of these products will be marked with a SAE, API, or JASO mark. High-quality products will be designated with these symbols.

Riding Style

Because motorcycle oil differs based on the riding style, it’s essential that you know yours. Since hard riding causes higher temperatures than normal riding, synthetic motorcycle oil is recommended for performance enthusiasts. These oils are specially designed to withstand extreme temperatures without breaking down. A calm driver, on the other hand, would benefit from buying mineral oil.

Oil Grade

It is very important that your motorcycle uses the right grade of oil. By expressing the temperature range and viscosity of the oil, it provides the user with an accurate lubrication recommendation. These numbers, for instance, describe the viscosity of 5W-40 oil.

Number 1 is low-temperature rating for determining viscosity in winter. Winter is represented by the letter ‘W’. High-temperature ratings apply to the second grade of viscosity. As a result, if you live in a very cold climate then you should purchase motorcycle oil with a low “W” rating.



That’s not true. Oils used for motorcycles and motor engines operate on totally different wavelengths. Motorbikes should not be used with these oils.


The manual of your bike should tell you how to do this. If you follow the manufacturer’s instructions, you won’t go wrong. Each bike has its own set of requirements. It is a good idea to check whether the product has at least one of the following certifications: API, JASO, and ILSAC.


However, synthetic oil may not be suitable for every motorcycle. To pick the product that’s right for your motorcycle, check the owner’s manual.

Final Thoughts

In order to keep your engine running smoothly, we recommend Yamalube SAE 10W-40 Oil. If you want an affordable yet long-lasting Best 20w40 Motorcycle Oil that doesn’t need to be drained out often, Lucas SAE 10W-40 Semi-Synthetic Motorcycle Oil would be a good choice.

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