Can I Put Car Oil In My 4 Stroke Motorcycle

Can I Put Car Oil In My 4 Stroke Motorcycle?

Selecting the proper oil is essential for motorcycle maintenance. It helps to prolong the life of your bike in addition to maintaining the smooth operation of your engine. Is it okay to use car oil in a 4-stroke motorcycle? is a common query from motorcycle owners. The differences between car oil and motorcycle oil, as well as the advantages and disadvantages of using car oil in a 4-stroke motorcycle, will all be covered in this article.

Understanding 4-Stroke Engines

It’s critical to comprehend how a 4-stroke engine operates before delving further into the subject of oil. The engine has four strokes: induction, compression, power, and exhaust. The piston descends during the intake stroke, allowing fuel and air to enter the cylinder.

The piston rises during the compression stroke, compressing the fuel and air mixture. When the compressed fuel and air are ignited, the piston descends and power is transferred to the crankshaft during the power stroke. Finally, the piston rises during the exhaust stroke, releasing the cylinder’s exhaust gases.

It’s significant to remember that 2-stroke engines and 4-stroke engines have various lubrication systems. While 2-stroke engines use a mixture of fuel and oil to lubricate the engine, 4-stroke engines have an oil pump that circulates oil throughout the engine.

The Importance of Lubrication

The proper operation of a 4-stroke engine depends on lubrication. Oil reduces friction and wear by lubricating the engine’s moving parts. By releasing heat, it also assists in keeping the engine cool. Without the right lubrication, the engine could sustain serious damage and require expensive repairs.

Differences between Car Oil and Motorcycle Oil

Despite having a similar appearance, the composition, viscosity, and additives of motorcycle oil and car oil are very different from one another.

The moving parts of a car engine, which is typically bigger and heavier than a motorcycle engine, are designed to be lubricated by car oil. Car oil typically has a higher viscosity, which makes it thicker and slower to flow. Detergents and other additives are also found in car oil, which helps to keep the engine clean, but these additives can be damaging to a motorcycle engine.

On the other hand, motorcycle oil is made specifically for motorcycle engines. Its lower viscosity enables it to flow more quickly and offer better lubrication for the motorcycle engine’s smaller, faster moving parts. Additionally, it includes specialized additives that are created to guard the engine against the particular stresses that come with riding a motorcycle, such as high RPMs and sweltering temperatures.

Can Car Oil Be Used In A 4-Stroke Motorcycle?

Can Car Oil Be Used In A 4-Stroke Motorcycle

Therefore, is it safe to use car oil in a four-stroke motorcycle? The quick response is no. Car oil may work well to lubricate the moving parts of a car engine, but it is not designed with the specific requirements of a motorcycle engine in mind. Using car oil in your motorcycle can result in a number of issues, including:

Reduced Lubrication: The smaller, faster moving parts of a motorcycle engine can be more challenging for car oil to flow through due to its higher viscosity. Increased friction, wear, and heat buildup may result from this.

Detergents and other additives that are present in car oil can harm a motorcycle engine. They may result in deposits accumulating, obstructing oil passages and lowering the engine’s capacity to release heat.

Shortened Engine Life: Using the incorrect oil in your motorcycle over time can cause increased wear and damage, ultimately reducing the engine’s lifespan.

It’s important to remember, though, that using car oil sparingly is preferable to using none at all. Using car oil is preferable to riding without oil if you find yourself in a situation where motorcycle oil is not available and you need to ride. However, in order to prevent long-term harm, it’s crucial to change the oil as soon as possible.


Always consult the owner’s manual for the manufacturer’s recommendations when selecting the proper oil for your motorcycle. They will detail the kind of oil that is suggested for your particular motorcycle’s make and model.

The oil’s viscosity rating should also be taken into consideration; this is typically indicated by a number like 10W-40. When the engine is cold, the oil’s viscosity is indicated by the first number (10W), and when the engine is hot, by the second number (40). The thinner the oil is, and the better it will flow through your engine, the lower the numbers.


Finally, despite the temptation to use car oil in your 4-stroke motorcycle, it’s crucial to keep in mind that motorcycle oil is specially formulated to meet the specific requirements of a motorcycle engine. The use of car oil can result in decreased lubrication, dangerous additives, and a shorter engine life. When choosing an oil, always refer to your owner’s manual for the manufacturer’s suggestions and consider the oil’s viscosity rating. Also keep in mind that using car oil in an emergency is preferable to using no oil at all, but you should change the oil as soon as possible.