4 Best 4t engine oil for bikes

Four-stroke bikes were around for quite a while, with bikes such as Gilera 500 Rondine or  Triumph Model H as early as the 1930s. But it took time for the bike enthusiast to understand the benefits of 4T engines. But nowadays, 4t engines are everywhere, from pickup trucks to lawnmowers and, of course, bikes. 

4-stroke or 4-T engines tend to be more powerful and typically have larger displacement than two-strokes, resulting in even more power.  Also, four-stroke engines tend to emit less pollution than their two-stroke counterparts. While four-stroke engines still produce these pollutants, such as hydrocarbons and carbon monoxide, into the atmosphere, they do so in much smaller quantities.

But to produce power and work properly, the 4T engines in your bike need proper lubrication. So, what is the best 4t engine oil for bikes? If you are looking for the best quality 4t engine oil that will work well for your bike, this guide will help you pick one.

4 Best 4t engine oil for bikes

1. Maxima (30-029128 Pro Plus+ 10W-40

Maxima (30-029128 Pro Plus+ 10W-40 is an excellent 4t engine oil for bikes if you need a high-quality 100% synthetic blend. 

What makes it a great 4t engine oil for bikes? Maxima (30-029128 Pro Plus+ contains a unique combination of additives and base oils that provide outstanding protection against wear, corrosion, and deposits.

The Anti-wear and Anti-scuff additive technology help ensure reliable performance in even the most demanding operating conditions as it can operate at elevated temperatures and under high loads.

Maxima (30-029128 Pro Plus+ also meets all the necessary standards such as JASO MA, API SL/SJ/SH/SG. So there are no worries, but it is a substandard oil.

2. Castrol 06130 Actevo 10W-40 4T Motorcycle Oil

The Castrol 06130 Actevo 10W-40 is a 4t engine oil for bikes designed with Active Protection Molecules, which help keep your engine clean and protected from wear and tear. 

The Active Protection Molecules technology in Castrol 06130 help to keep your engine clean by reducing the dirt build-up and protecting against the formation of sludge. 

This oil also helps to protect your engine from wear and tear by reducing friction and providing a buffer against metal-to-metal contact. 

The Castrol 06130 Actevo 10W-40 is an excellent choice for those who want maximum protection for their 4t engine, along with the clutch and gearbox. Also, this is one of the cheapest 4t engine oil for bikes and a renowned engine oil brand like Castrol. 

3. Valvoline 4-Stroke Motorcycle 10W-40 Motor Oil

Valvoline 4-Stroke Motorcycle 10W-40 Motor Oil is one of the best 4t engine oil for bikes you can find out there. In addition, it comes with a unique anti-shudder technology to improve the performance of your bike. But what exactly is anti-shudder technology, and why do you need it in your bikes?

Shuddering is caused by imbalances in the engine. When one cylinder fires, it creates a small amount of vibration. This can be amplified if there are imbalances in the engine, causing the whole bike to shake. This is why it’s important to use an oil with good anti-shudder protection like Valvoline 4-Stroke Motorcycle 10W-40 Motor Oil. It will help to keep your bike engine running smoothly and prevent damage caused by vibration.

Besides the anti-shudder protection, Valvoline 4-Stroke Motorcycle 10W-40 Motor Oil is designed with anti-wear technology and necessary additives for whatever RPM and temperature you intend to ride on.

4. Motul Aceite 4T 5100 10W40 

Motul Aceite 4T 5100 10W40 is another excellent 4t engine oil for bikes made with the same base stocks used for lubricating the jet engine. Motul Aceite 4T is a synthetic blend engine oil for bikes that is made with Ester.

Synthetic ester base stocks are used in motor oils to improve their performance, and they have properties that make them ideal for use in motor oils. This is what makes Motul Aceite 4T 5100 10W40 more thermally stable than most oils out there, as they have a higher flash point. 

Due to synthetic esters, Motul Aceite 4T 5100 10W40 has a higher viscosity index, so it can maintain the viscosity or the thickness to flow better in cold weather and resist breakdown under high temperatures and pressures.

Most importantly, it is one of the best 4t engine oils for bikes both price-wise and due to its excellent performance in different temperatures. 

FAQ

What does the JASO oil specification mean?

The JASO oil specification is a set of standards for motorcycle oils that the Japanese Automotive Standards Organization developed. The standards are divided into two categories: JASO MA and JASO MB. JASO MA oils are used in 4-stroke motorcycle engines, while JASO MB oils are used in scooters. 

Do you need to mix fuel for a 4-stroke?

Oil and gas mixing is one of the most annoying and potentially messy aspects of owning a two-stroke engine bike, but you can fill up your gas tank and go with a four-stroke. In addition, you don’t need to mix fuel for a 4-stroke engine bike as the gas and oil are mixed automatically in the engine, so you need to add gasoline to the tank. 

How to tell the difference between a two-stroke and four-stroke bike?

There are a few key things you can look for when trying to figure out if a bike is a two-stroke or four-stroke. But, of course, there are always exceptions to the rule, so if you’re not sure which type of bike you’re looking at, it’s always best to ask a knowledgeable friend or the staff at your local bike shop.

  1. Position of the spark plug – on a two-stroke, it will be in the front, while on a four-stroke, it will be in the back. 
  1. Engine sounds – a two-stroke typically has a high-pitched, “buzzy” sound, while a four-stroke usually sounds more profound and muffled.
  1. The exhaust pipe – on a two-stroke, it will generally be shorter and go straight out the back of the bike, while on a four-stroke, it will be longer and often curve around the side of the bike.

Which one is faster, between a 2-stroke and 4-stroke engine?

Regarding speed, there is no clear winner between a 2-stroke and 4-stroke engine. Both can achieve high speeds, ultimately due to the individual engine design. However, some general differences between the two types of engines can affect speed.

2-stroke engines typically have a higher power-to-weight ratio than 4-stroke engines, which can accelerate faster. 2-stroke engines also have a shorter stroke length than 4-stroke engines, which can contribute to a higher RPM.

4-stroke engines, on the other hand, typically have more torque than 2-stroke engines. This can make them better suited for sustained high speeds rather than quick acceleration.

Final verdict 

So, which one is the best 4t engine oil for bikes? Of course, it depends on your individual needs and preferences and the weather you live in, as different weather demands different engine oils. However, all the 4t engine oil for bikes I have reviewed here has one common characteristic: they can be used to a highly varied temperature. But if I were to pick one, I would certainly choose the Motul Aceite 4T 5100 10W40 as it is a high-performance 4t engine oil for bikes that comes for half the price of most engine oil for bikes out there.

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