This article may contain affiliate links. When you purchase through links on our site, we may earn an affiliate commission.
As any rider knows, it’s important to take good care of our motorcycle. Badly maintained bikes are dangerous! With so many moving parts, it’s too easy for something to go wrong.
Of course, we could just take it to the garage. But when it comes to basic maintenance, there’s so much we can do at home! Starting with changing the oil.
But choosing an oil can be overwhelming. There is such an array of different bottles on the shelf; which one should we pick? So, we decided to take a peek at the best motorcycle oils around to help you choose the perfect product for your hog.
- Top 6 Best Motorcycle Oils To Purchase In 2021 Reviews
- 1 Rotella Shell Rotella T6 Full Synthetic 5W-40 Diesel Engine Oil – Best Extreme Temperature Motorcycle Oil
- 2 Red Line 42504 20W-50 Motorcycle Oil, 1 Quart (32 Ounces) – Best Twin Engine Motorcycle Oil
- 3 AmazonBasics Full Synthetic Motor Oil – 5W-40 – 1 Gallon – Best Bulk Protective Motorcycle Oil
- 4 Castrol 06518 Edge 0W-40 A3/B4 Advanced Full Synthetic Motor Oil – Best Performance Enhancing Motorcycle Oil
- 5 Valvoline Daily Protection SAE 10W-30 Conventional Motor Oil 5 QT – Best User Friendly Conventional Motorcycle Oil
- 6 Yamalube All Purpose 4 Four Stroke Oil 10w-40 1 Gallon (2 Gallons) – Best Petroleum Based Motorcycle Oil for Improved Clutch Performance
- Best Motorcycle Oils Buying Guide
- Benefits of the Best Motorcycle Oils
- Types of Motorcycle Oil
- Top Brands
- Motorcycle Oils Pricing
- Looking for other great moto-care products?
- So, which of the Best Motorcycle Oils is going in our bike?
Top 6 Best Motorcycle Oils To Purchase In 2021 Reviews
1 Rotella Shell Rotella T6 Full Synthetic 5W-40 Diesel Engine Oil – Best Extreme Temperature Motorcycle Oil
Start your engines
To kick things off, let’s check out this product from Shell Rotella. In this bottle, we get a whole gallon of engine lubricant. With a quantity like this, it’s sure to keep us going for a long time to come.
This is a fully synthetic oil. There’s no petroleum involved here. That artificial base is backed up by a variety of additives that offer a whole range of benefits.
Well, to start, they improve fuel economy. In fact, this oil can increase it by 1.5%. Let’s face it, gas isn’t cheap, so anything that helps save money is fine by us.
Some of those chemicals can increase resistance to heat, too. Motorcycle engines get incredibly hot, and having an additive that counteracts this is really helpful. We’ll talk more about this later.
Plus, it’s better for the environment than many other options. It has an impressive, low-ash formula. It will help to control exhaust fumes, keeping the bike well within local emission guidelines.
Let’s talk viscosity…
This one has an SAE grade of 5W-30. This means it’s great for low-temperature rides! Even in chilly weather, the oil flows well and won’t thicken or slow down. And remember those heat-resistant additives we mentioned earlier? They affect the viscosity too. This one performs well in hot weather, without thinning too much in the sun.
What we have here is a solid, reliable product. Shell Rotella promised us a heavy-duty, extreme temperature oil, and that’s exactly what they’ve provided. All this, and at an extremely reasonable price!
- Emission control.
- Consistent viscosity.
- Excellent value of money.
- Some riders prefer conventional base oils.
2 Red Line 42504 20W-50 Motorcycle Oil, 1 Quart (32 Ounces) – Best Twin Engine Motorcycle Oil
Burning the midnight oil
There can be few riders around who haven’t heard of Red Line. Since 1979, this trusted brand has been producing high-performance motor fluids for a wide range of motorsports.
Can this oil live up to its sterling reputation?
This one is designed with big twin engines in mind. It could well be the best motorcycle oil for Harley Davidson bikes! But it’s not just for Harleys. It would make a good choice for almost any 4-stroke engine too.
Once again, this is a synthetic based formula. Everything in this compound is beneficial to the bike. It contains none of those performance reducing elements that can often be found in petroleum oils.
Does it contain additives?
Of course, it does! This one has high levels of phosphorus and zinc. Chemicals like these are perfect for wear and tear reduction to keep the engine running smoothly.
And those additives have other advantages. A big one here is viscosity control. With a 20W-50 rating, it performs well in high heat, making it perfect for those hot summer days.
Is there a catch?
Beware, though; in very low temperatures, it can be sluggish at start-up. A 20W rated oil won’t do as well in extreme weather as some others. Anyone riding in the Minnesotan winter may want to look elsewhere.
And we don’t get a high amount of liquid. There are only 32 ounces here. While it’s not incredibly expensive, we would expect a little more for the price. However, we don’t need to use it that often. This oil is extremely durable! Thanks to those superlative additives, it needs to be changed far less often than many other brands.
So maybe we don’t need that much! After all, this will keep us oiled up for a while!
- Manufactured with Harley Davidson in mind.
- Good SAE grade.
- Low capacity for the price.
- Less effective in cold weather.
3 AmazonBasics Full Synthetic Motor Oil – 5W-40 – 1 Gallon – Best Bulk Protective Motorcycle Oil
The little engine that could
With its 5W-40 SAE rating, the next item on our list of the best motorcycle oils has an amazing range! This one has fantastic heat control. The viscosity remains consistent, regardless of the temperature outside.
At one gallon, there’s a lot of oil here. We doubt we’ll be running out in a hurry! And that longevity is improved by a formula that promises an increased length of time between drain intervals.
Is it a conventional or synthetic base?
It is synthetic. And it’s not blended, either. This one is 100% manmade for optimum levels of performance. And what a performance it offers! This has fantastic protective qualities. It does a brilliant job of cleaning that nasty build-up that engines always get to keep things running smoothly.
The friction protection is excellent, too. It keeps everything well-lubed up. The moving parts in the engine pass each other by cleanly, without rubbing together.
How about fuel economy?
This oil improves it. It’ll keep the bike going for longer without refilling the tank. It’s an excellent choice for riders with huge, gas-guzzling machines.
This sounds too good to be true! Is it?
Not really! Here we have a superb bottle of synthetic motorcycle oil. It gives us everything we need at a reasonable price.
There is just one problem, though. And it’s to do with the bottle. It isn’t see-through.
We know it’s a small complaint! But it does mean we can’t see how much we’re pouring out. While it does have measurement markings, they’re not much good if we can’t see the level of the oil, are they?
- Large capacity.
- Great performance.
- Poor container design.
4 Castrol 06518 Edge 0W-40 A3/B4 Advanced Full Synthetic Motor Oil – Best Performance Enhancing Motorcycle Oil
You’re oil I need
Up next is this Castrol motorcycle oil. Everyone has heard of Castrol! Well-known and widely respected, this brand has been at the forefront of motor oil and fluid manufacture for many years.
With this product, we get a quart of synthetic motorcycle oil. That doesn’t seem like much. After all, it’s a similar price to other oils, so why the low capacity?
Because it’s incredibly long-lasting, that’s why! We don’t need to change this oil as often as we do with other brands. This one gives us a massive amount of time between drainage intervals, so this bottle will be around for a while.
What other benefits does it have?
Well, for a start, it improves the film strength by an enormous 30%! This is fantastic when it comes to friction reduction. It keeps everything moving as it should, enhancing the engine’s performance.
And that’s not all!
It has a whopping 42% improvement rating for deposit removal! This one keeps it clean. Built-up grit and grime are no joke, and this oil takes care of them well.
Plus, the SAE rating is first-rate, too. It has a 0W-40 grade. From icy mountain tops to sweltering runs through Death Valley, the viscosity is completely dependable.
Are there any downsides?
To be honest, we’re struggling to find one! Other than the smaller amount of liquid, there aren’t really any negatives here. It provides everything we need and doesn’t break the bank in doing so.
We love it!
- Reliable manufacturer.
- Excellent viscosity.
- Top-notch film strength.
- Limited volume.
5 Valvoline Daily Protection SAE 10W-30 Conventional Motor Oil 5 QT – Best User Friendly Conventional Motorcycle Oil
Oil be back.
The penultimate item in this review is the first non-synthetic oil we’ve looked that. This time, we have a conventional formula. Does it work as well as its synthetic contenders?
Well, there’s a lot to like here. For a start, there’s a huge amount of it. At 1.25 gallons, this is an enormously big bottle of fluid!
And speaking of the bottle, it has been designed with the user in mind. We’ve all been guilty of spilling oil during a change and know the headache that comes with the clean-up. But thanks to a precision-pour spout, and an ‘anti-glug’ tube, this vessel makes overflow a thing of the past.
That sounds great! But does it work?
The additives used here are formidable. A strong detergent does a brilliant job of washing sludge away. And it has a protective element too, for preventing those deposits from building up in the first place.
Plus, it contains chemicals with anti-wear properties. That sounds complicated, but don’t worry, it isn’t! All this means is that this oil won’t be spent in a hurry, as it is very durable.
So far, so good! But are there any negatives?
Unfortunately, yes. As this is petroleum-based, it has some chemicals we don’t want, as well as those we do. It works well, but not as well as synthetic bases.
And the viscosity rating can’t quite match some of the others we’ve seen. At 10W-30, it’s ideal for hot days! But in freezing conditions, the machine might be a little sluggish.
So, there are pros and cons. But we think there are far more pros!
- User-friendly, anti-spill design.
- Fantastic cleaning properties.
- Conventional base.
- Thickens in low temperatures.
6 Yamalube All Purpose 4 Four Stroke Oil 10w-40 1 Gallon (2 Gallons) – Best Petroleum Based Motorcycle Oil for Improved Clutch Performance
Oil or nothing
Last but not least, is this 10W-40 oil from Yamalube. This time, we have a mineral oil.
“What is a mineral oil?” we hear you cry!
Don’t panic! Mineral oil is just another way of saying conventional oil. Our final item is a petroleum-based choice. But, it’s blended with additives, too. That makes this a mineral-based, semi-synthetic oil. Wow, try that 10 times fast!
Now, Yamalube is an offshoot of the world-renowned Yamaha brand. Anyone who has bought a brand-new Yamaha motorcycle from the showroom will probably already have this oil in the engine.
But can it stand up against the other products we’ve already reviewed?
It’s pretty good, actually! It has impressive film strength. It offers excellent protection against everyday depreciation and prevents dirty deposits from jamming things up.
Plus, it improves clutch performance. No rider wants the transmission to slip too much. This oil offers fantastic friction modification to make sure the clutch fully engages every time.
How about the viscosity?
As we mentioned earlier, this oil has an SAE rating of 10W-40. It does really well in the summer heat. It won’t thin out too much and make the transmission greasy. But, that 10W grade means in very cold conditions, it might thicken up. Other oils work better under these circumstances. Sure, it won’t matter in most climates! But riding in a snowstorm could have issues.
And remember, petroleum oils can have impurities. Thanks to the additives, most of them should have been removed. However, we may find that some have been left behind.
What’s the best part?
Coming in two one-gallon jugs, the buyer gets a massive amount of product! The quantities involved here are huge. With a product like this, we’ll have oil for life!
- Two gallons of fluid.
- Excellent clutch performance.
- Great brand.
- Mineral oil.
- Problematic in extreme temperatures.
Best Motorcycle Oils Buying Guide
Buying motorcycle oil is a challenge. All those different brands with different ratings; how do we know which one to buy? Well, stop worrying now! We’ve put this handy guide together for you to help out.
Firstly, we need to consider which type of oil to use. Generally speaking, the choice is between conventional, synthetic, or blended bases.
Which one is the best?
While they all have their particular pros and cons, we’d choose synthetic every time. Purists may prefer petroleum, but it just doesn’t have the same benefits thanks to that contamination from unwanted chemicals. As synthetic oils are manmade using the perfect recipe, based on performance, they beat mineral oils every time.
Next, there’s viscosity. We know; we mentioned it so many times throughout this review!
But what does it really mean?
Viscosity is simply how thick a liquid is. It determines how well the oil can flow. Too thick, and it will be sluggish, but if too thin, then it becomes runny.
When we talk about viscosity, we need to discuss SAE grades. SAE is The Society of Automotive Engineers. They came up with a handy system for rating the viscosity of motorcycle engine oil. We’re sure you’ve seen those numbers on the front of the bottle. They usually say something like 0W-30 or 20W-40. That right, there is the SAE grade.
The ‘W’ part references cold temperatures. The lower the numbers, the better the oil retains its consistency in chilly conditions. It is decided by measuring the viscosity of the oil at 104°F.
Then the second number informs us of how the oil behaves at higher heat. It’s chosen by checking the oil at 212°F. Here, we want a high number for an oil that remains in a consistent condition even when extremely hot.
There! That wasn’t so hard, was it!
We also have to think about the additives involved. It’s imperative that they reduce friction. Friction can actually diminish the engine’s performance by a massive 10%, so stopping parts from rubbing together is incredibly important.
But they should have other qualities, too. Anti-corrosion properties, protection against grime, cleaning detergent; these are all important things to have. Different chemical compounds offer various aspects, so check the bottle carefully.
Finally, pick an oil that’s long-lasting. It often comes in small bottles, so we don’t want to keep changing it. A product that increases the intervals between draining is the way to go here.
Phew! There’s a lot to consider. We have hopefully given you a better idea of how to select one of the best motorbike oils on the market.
Benefits of the Best Motorcycle Oils
Do we really need to use oil in a motorcycle?
Yes, is the short answer there! A decent oil is absolutely crucial when it comes to taking care of a bike.
Well, first, it keeps everything moving. By reducing contact between the different parts of the engine, it minimizes friction. This ensures they’ll last longer, as well as improving their performance.
And thanks to that minimized friction, it helps to keep the engine cool. If the components rub against each other too much, they can get seriously hot. Oil prevents this from happening, so the motorcycle won’t overheat.
It keeps combustion gases in place as well. Oil acts as a kind of seal in various spots throughout the engine. Holding those gases in results in improved horsepower for the speed demons out there!
And don’t forget…
In addition to all that, oil prevents rust. It can form a defensive layer over the metal, protecting it from corrosion. Alternatively, it can work by offsetting the damage done by any caustic materials.
We should mention fuel economy, too. A good motorcycle oil can improve it. Hey, we all want to spend less on gas, don’t we? Engine oil can really help out our pocketbook!
Finally, there’s just one last benefit…
It helps to keep things clean. Oil can wash off any impurities or even lift and trap them away from the engine components.
So, as we can see, there are plenty of reasons to use motorcycle oil! And lots of reasons to make sure we choose a good one. All riders demand high performance out of their bike, and choosing a quality product makes sure we get it!
Types of Motorcycle Oil
When we’re talking about something like engine oil, it is easy to get confused. Too much technical jargon can be overwhelming. Don’t worry; we’re going to keep things very simple.
There are three basic types of motorcycle engine oil. The first one is conventional oil. This starts off with a petroleum base, which is refined to remove impurities.
This is all well and good, but there is an issue with petroleum oil. That refining process cannot completely remove everything we don’t want. As it works by separating the various compounds by weight, it’s easy for some contamination to get left behind.
The best alternative?
Then, there are synthetic-based oils. As the name suggests, they’re formulated from synthetic materials. As they’re engineered to a specific recipe, it means they contain no unwanted chemicals or molecules for superior performance.
Finally, we have blended oil. These are exactly what they sound like; a mix of conventional and synthetic bases. As might be expected, they generally do a better job than petroleum formulas but don’t quite match the standards of a synthetic oil.
See! We told you it was straightforward!
With such a variety of brands to select from, picking the right one can be challenging. It’s easy to assume that the highest price is always the best option. But that’s not always the case.
Some manufacturers offer a lot more than others. They often have a long-standing reputation for top-notch standards. But others cut corners, using cheaper, low-quality materials.
So who can you trust?
When talking about the best brands of motorcycle oil, Castrol is usually one of the first to be mentioned. There’s a reason it’s used in racing. They offer extremely high quality without damaging the pocketbook.
Then there’s Shell Rotella. Everyone has stopped at a Shell gas station at some point. These days, the word Shell has become synonymous with motor oils and fluid.
We have to talk about Red Line, too…
This is often the most popular choice for Harley riders. Red Line products perform brilliantly when used in suitable engines.
The final product in our review today was made by Yamalube. As mentioned earlier, Yamalube comes from Yamaha. If there’s one thing Yamaha is known for, it’s reliability! And oils made by them are no exception.
Of course, there are other brands around with many excellent qualities! But we think these companies are at the top end of the spectrum when it comes to high standard oil.
Motorcycle Oils Pricing
With most things in life, you know it, we get what we pay for. Want top quality? Sorry, but you’re usually going to have to pay top prices. But, there’s no need to go overboard. Engine oil brands have a lot of competition these days. It’s entirely possible to get a great bottle of oil at a very reasonable price.
Of course, it does depend on how much liquid we get. More oil generally equals a higher price. Really, we’d expect to pay $20 – $30 for a decent product.
And remember! Everyone wants to save money, but don’t cheap out. A good bottle of oil is always worth paying for.
Looking for other great moto-care products?
You may also be interested in the latest must-haves for bikers? Don’t miss our reviews of the Best Motorcycle Phone Mounts, the Best Motorcycle Radios, the Best Motorcycle Tank Bags, and the Best Motorcycle Seat Pads currently available on the market in 2021.
Back to the best motor oils for motorbikes…
So, which of the Best Motorcycle Oils is going in our bike?
It’s not easy to choose between different oils. But in the end, the winner had to be the…
The viscosity rating here made it almost impossible to beat. It remains consistent in such a wide variety of temperatures. Other oils performed well, but this one had the greatest range.
Plus, it has a synthetic base. The combination of additives is perfect. Great friction modification, excellent cleaning properties, tough film strength; what more could we need?
Happy riding, folks!