Maintaining your beloved motorcycle is an absolute must, regardless of which one you own. A crucial portion of that maintenance is keeping your engine cool. And coolants are incredibly useful in ensuring that and more.
Not only do these liquids keep your engine cool and out of harm’s way due to overheating, but they can also protect it against corrosion. However, choosing the best motorcycle coolant isn’t as easy as just picking one up.
Hence, to help you choose the correct coolant with a decent runtime for your bike, we have compiled some of the most impressive products out there. We will try to cover various price ranges and types so that everyone can find one that suits them.
Need suggestions to decide? Check top 3 choices below
8 Best Motorcycle Antifreeze/ Coolant Reviews
Getting a quality coolant can make a significant difference in how well your engine runs. Here are the coolants that will provide you with impressive results.
1. Zerex G05 Coolant
One of the most substantial benefits of the usage of antifreeze (which turns into a coolant once you mix water to it) is that it lowers the freezing point and prevents the vehicle from freezing. Therefore, the fluid’s quality must be uncompromised.
Our first pick is a concentrate from Zerex that comes with an efficient system to give you the best possible results. This coolant contains nitrite, which protects diesel-run cylinder liners from any build-ups and ensures a long runtime.
This product prides itself on being phosphate-free, and there is a good reason for that. The issue with that element is that it forms a film that coats its metal surroundings when it comes in touch with water and prevents the coolant from working as expected.
And the reason it’s frowned upon is that it can have a negative effect on cooling efficiency. Furthermore, you can use this formula with both gasoline and diesel engines, which makes it all the more versatile.
Moreover, it features a low silicate and reduced pH formula. Silicate is an abrasive element that might affect your engine, but it also prevents corrosion. And a higher pH level can also be ill-suited for the components, so that’s a bonus.
Another impressive bit is that it contains an efficient defoamer system. As you can guess from the name, it is an additive that reduces the build-up of foam and air in fluids. That ensures a better performance.
- Contains nitrite to protect components
- Efficient defoamer system
- Support for gasoline and diesel engines
- Deposit control additives
- Free of phosphate
- You require manual dilution
- Occasional build-ups
2. Engine Ice High Performance Coolant
Many users prefer to buy a premixed cooling fluid, which is then called the coolant. And that is because they do not want to go through the hassle of mixing distilled water with it and want to be able to use it right away.
Our next pick, the TYDS008 from Engine Ice, is an excellent option if you are one of them. This coolant comes premixed with de-ionized water (the same ballpark as distilled water, but different manufacturing process) and makes things easier for you.
What impresses us the most about this coolant is that it cares about the effect it might have on humans and the environment. And that is why this product is completely biodegradable and has a lower toxicity level than other options.
To achieve that, it uses propylene glycol instead of ethylene as the latter is comparatively more toxic. Furthermore, this phosphate-free fluid keeps freeze-up protection to -26° Fahrenheit and boil-over temperatures to 256° Fahrenheit.
If you want an idea of its effectiveness, it can provide a temperature reduction of anywhere from 10° Fahrenheit to 20° Fahrenheit. This coolant is also allowed in CCS and ASRA road racing, which speaks for itself.
The usage of propylene glycol also eliminates the possibility of gasket and seal failures. That makes it suitable for high-stress conditions. Moreover, it does a superb job of protecting aluminum, as it does not contain any abrasive elements.
- Impressive temperature reduction
- Legal in various racing tournaments
- Premixed with de-ionized water
- Safe for aluminum
- Completely biodegradable
- Performance can occasionally fluctuate
- Propylene isn’t as efficient as ethylene
3. Honda Genuine Coolant
As you might know, coolants have changed drastically over the years, with the engines shifting towards aluminum components. And unlike elements like iron, aluminum does not bode well with ingredients like phosphate or silicate.
Our next pick is from an industry veteran – Honda. Any motorcycle owner is bound to know who these guys are, and this type-2 coolant from them fulfills all your expectations, especially with its extended lifetime and unique protection system.
But before we talk about that, let’s get back to the issue with abrasive agents like phosphate. While these protect against corrosion, they might create a film all around its surroundings to hurt efficient heat dissipation.
Therefore, this formula does not contain phosphate, silicate, or borates, making it safe for your engine. Another crucial bit is the expected lifetime. Most mediocre products will last around two years with some luck and then start causing various issues.
However, this one can keep your engine cooled for up to five years, which is nothing short of impressive. Another vital bit to consider is the performance when facing extreme conditions and temperatures such as a race track.
To our pleasure, this coolant outputs impressive efficiency and protection even in conditions ranging down to -34° Fahrenheit up to 228° Fahrenheit. Moreover, it comes premixed so that you do not need to go through the mixing and measuring process.
- No abrasive elements
- Comes already mixed
- You get cooling for up to five years
- Exceptional rust protection
- Safe for aluminum components
- Rust protection could be slightly better
- Packaging needs some work
4. Maxima Coolanol Performance Coolant
One of the biggest enemies of a coolant’s efficient performance is the lack of anti-foaming agents, which can turn out to be more significant than you think. These elements play a vital role in reducing cavitation in the water pump.
In turn, they can also ensure better cooling capacity. The next coolant we have for you is the 82964 from Maxima – a product with an impressive performance in those regards. It is a product that comes mixed with de-ionized water for your convenience.
Moreover, it is also more time-efficient, as you would need to mix it with de-ionized or distilled water yourself. In terms of the glycol solution, it uses high-quality ethylene glycol, which is well-known for its performance in extreme conditions.
And not just that, it also provides you with superb anti-corrosive capabilities to keep the components safe.
The only caveat with it is that it’s highly toxic and harmful to the environment, even if its performance is as good as it gets.
Furthermore, this coolant is safe for aluminum and magnesium motorcycles, so you don’t need to worry about that. Another impressive property of this product is its protection against freeze-ups – going all the way down to -34° Fahrenheit.
Not only does it lower the freezing temperature, but it also increases the boiling temperature to 265-degree Fahrenheit, which is impressive.
Lastly, it comes with a low-silicate formula. This bit ensures that the aluminum or magnesium components do not face any harm.
- Freeze protection down to -34-degree Fahrenheit
- Extremely low-silicate formula
- Safe for aluminum and magnesium motorcycles
- Includes anti-foaming agents
- Optimum corrosion protection
- Ethylene glycol is toxic
- Rust resistance could be better
5. Zerex Original Prediluted Coolant
As you might know by now, the coolants that you use in your motorbike are usually toxic, although the level might vary depending on many variables. That makes it dangerous for children or animals to consume, leading to severe health issues.
Therefore, to prevent that from happening, this coolant uses 30 – 50 ppm of denatonium benzoate. This element is a bittering agent that prevents any living beings from consuming it. Now, let’s talk about the corrosion resistance of this product.
Unlike many of the other options, this one does not rely on silicate for protection against rust. That is because it is an abrasive agent that can have some adverse effects on your engine’s components and hurt their efficiency.
Therefore, this coolant uses the manufacturer’s patented corrosion inhibitor package with organic acid instead of silicate.
It doesn’t harm the components and still does an excellent job with rust resistance. Another impressive side is the freeze protection capability of this fluid.
It can prevent the water from freezing all the way down to -34 degrees Fahrenheit, which is impressive. And speaking of which, this coolant comes premixed with de-ionized water to save you from having to do the extra work.
Another impressive bit about this product is its longevity. It can keep your engine cooled for up to five years, which is very impressive. And it doesn’t only lower the freezing point, but it also boosts the boiling point for better performance.
- Prediluted and ready-to-use
- Low-silicate mix
- Corrosion inhibitor package
- Suitable for any vehicle that supports green coolants
- Has a bittering agent
- A bit costlier than undiluted ones
- Support for only green coolant vehicles
6. Evans Waterless Engine Coolant
At this point, we have an unusual option for you from Evans. The products we have reviewed so far rely on a mixture of water (generally 50/50). However, the following coolant is a waterless one, which certainly has its pros.
As you might know, coolants with water generally face a few problems – a comparatively higher corrosion rate, coatings around the components, and so on. The absence of water allows for a corrosion-free performance for an extended period.
Moreover, water pump cavitation erosion is another issue that water-based solutions might cause. But in this case, you also stay free from that headache. The only caveat to the option for a waterless solution is that it might be slightly costlier.
Other than that, these options are well-suited for high-performance, high-stress situations.
You could easily use it for any motorcycles ranging from street bikes, trail bikes, Enduro bikes for harsh conditions such as race tracks.
Not only that, but the formula of this product also minimizes the possibilities of electrolysis issues. Therefore, even if you might need to dish out a bit more cash for this coolant, you save a lot in maintenance and replacement costs.
And if you are still not sure, this best motorcycle antifreeze is even popular for racing teams to keep their engines cool in extreme conditions. Furthermore, it has a boiling point of 375-degree Fahrenheit, which is significantly better than most available coolants.
- Contains no water
- Suitable for extreme conditions
- Slight chance of electrolysis issues
- Lack of water eliminates corrosion
- 375-degree Fahrenheit boiling point
- A bit costlier
- Water plays a role in better cooling
7. Red Line SuperCool Coolant
There is a caveat with getting antifreeze, as it does not come mixed from the manufacturer. The first issue is that you cannot use good old tap water with it. It requires either de-ionized or distilled water for the best performance.
Furthermore, you need to measure the mixture well to ensure that you get the best cooling performance possible. The following coolant comes with an optimum mix of antifreeze and de-ionized water to save you from that hassle.
And as we said, modern engines are more leaning towards the usage of aluminum, which cannot withstand some chemicals as well as cast iron. This coolant follows a suitable formula for anything ranging from aluminum, cast iron, or copper.
Another highlight of this product is something called WaterWetter. It is a solution from the manufacturer that is impressively efficient as a heat transfer agent, keeping your engine cool. Furthermore, it acts as a corrosion-resistant agent.
It does so by containing corrosion inhibitors, although they are not the traditional glycol-based solutions.
But their formula satisfies all the necessary tests that your standard glycol-based solutions do (ASTM corrosion tests – ASTM D2570 and ASTM D1384).
Thanks to all of these, this coolant works surprisingly well even in high-stress situations and pushes the freezing and boiling points’ limits. And it can decrease the temperature by up to 30 degrees, allowing the engine to provide its highest performance.
- WaterWetter technology
- Contains corrosion inhibition additives
- Suitable for aluminum, cast iron, copper
- Lowers temperature by up to 30 degrees
- Convenient and premixed
- Dilution makes it a bit pricier
- Rust resistance could be more robust
8. Castrol Motorcycle Coolant
We have reached the last of our list. This time, it’s from a well-known brand, Castrol. There is a reason ethylene glycol is so popular even after being a toxic element, and that is its excellent heat transferring (and disregard for the environment, to some extent).
Moreover, the freezing temperature is much lower, and the boiling temperature is much higher in comparison to other options. Therefore, the 154D1CV features an ethylene glycol-based solution with excellent cooling efficiency.
Furthermore, it comes premixed with the proper ratio between antifreeze and water. That means you do not have to break a sweat trying to get the distilled water and mixing things to achieve the perfect balance for efficient results.
Another part that impressed us about this coolant is its antifreeze performance. It can prevent any freezing all the way down to -25° Celsius, which is quite impressive. Not just that, but it also does well to prevent rust from forming.
That means the solution uses an effective formula to protect the components, regardless of whether they use aluminum or cast iron. And this protection also ensures a prolonged life without any corrosion.
Lastly, the price of this product is reasonable enough for what you get. Although, if you were to get an unmixed antifreeze, it would be comparatively more cost-efficient. But it does save you some hassle, so there’s that.
- Suitable for an array of motorcycles
- Prediluted out of the package
- Impressive heat transfer
- Antifreeze down to -25°C
- Protection against corrosion
- Contains toxic elements
- Pouring method can be a bit tricky
Things to Consider Before Buying Motorcycle Coolant
Buying a suitable coolant for your bike is not limited to it being a quality product. Therefore, you cannot opt for a product because you know the brand is trusted and creates quality coolants.
You firstly need to consider factors such as whether you want an anti-corrosive product or what its freezing point is. Moreover, the main ingredient can differ as well. So, here’s a shortlist you should look out for.
Knowing the expected lifetime of the coolant you choose is extremely important. You can find products that last only a year or twice that. A longer lifetime would give you better value for the money, although that partly depends on the price you pay for it.
Choosing something that lasts for a comparatively more extended period would also mean that you would not have to replace it as often, which is excellent.
Not all coolants have anti-corrosive properties. Manufacturers need to add anti-corrosion additives to the product to protect your engine from such a situation. The most common additive for that purpose is silicate.
There are other options too – phosphate, borate, and so on. It is not mandatory to choose a product with such elements. But if you want the coolant to protect the components from rusting, these are the most common options.
We talked about silicate just a minute ago. So, why are we doing that again? Well, a product that contains that ingredient will protect you against corrosion, but it might have some caveats.
For one, not every motorcycle will suit it. Moreover, it is an abrasive substance, meaning that you need to be careful while using it. Therefore, weigh your need and know for sure whether you want it on your bike.
This part essentially refers to the suitable operating temperature of the coolant. And that number depends on the average temperature of your bike’s engine.
Modern vehicles operate at a comparatively lower number, although some diesel-operated ones can go significantly higher. Regardless of your vehicle’s components, keep an eye on this limit.
You can find coolants that come premixed from the manufacturer to save you from going through that workload. Generally, you will find that these options cost a bit more in contrast to the unmixed ones.
However, these products use non-ionized or distilled water for mixing. That makes quality premixed coolants have a much higher life expectancy, which can save you some cost and provide better value.
The replacement process usually requires the same thing – thoroughly drain the previous cooler and ensure none of it remains inside before using the new one. But you need to be especially wary if the main ingredients vary.
Furthermore, you should be careful when you are disposing of the previous coolant. These products contain a severe amount of toxins that are harmful to humans and other creatures. Moreover, make sure the engine has cooled down before the replacement process.
Water-Based or Not?
You might be surprised to know that not all coolants have water mixed in them. Although those are the most common ones and therefore most cost-effective, there are other options.
Why should I consider the other options? – is what you might ask after that statement. Well, your traditional water-based coolant might not suffice for extreme purposes such as racing, as these use more powerful engines and produce more heat.
Therefore, you can find products free of water and have much higher heat resistance, allowing for better cooling of your engine. These can withstand much harsher conditions to their common alternatives.
Motorcycle Coolant Types
You can categorize these products into a few categories. However, we’ll talk about two of the most important ones – whether they are water-based and whether they use propylene or ethylene glycol. That’s because these can have a significant effect on performance.
Propylene or Ethylene
As you know, the coolant you use often has water mixed in it. However, the freezing and boiling limits for water alone are not very impressive. And we wouldn’t want our vehicle to freeze just because it’s a bit cold, right?
Manufacturers use chemicals like propylene glycol and ethylene glycol as they are low-temperature heat transfer fluids. While they have a lot in common, you will find some distinctions depending on their usage.
Boiling and Freezing Points
There is a slight distinction in performance between the two elements. When it comes to heat transfer, ethylene glycol does a better job in comparison (especially at a lower temperature). Propylene solutions are also more viscous at lower temperatures.
When it comes to toxicity, however, propylene glycol is less toxic in contrast. And while both ingredients allow the coolant to have better performance in terms of temperature endurance, this is a crucial distinction in coolants.
As we have already discussed a fair about this, we’ll move straight to the conclusion. Water-based coolants are much more cost-effective and provide a decent result for most use cases.
However, the ones that do not use water are generally much more resistant to heat and will provide better cooling performance.
Although most people would still be fine without these, so whether you need this is up to you.
Undoubtedly, the ones mentioned above are some of the best options you can opt for if you were looking for the best motorcycle coolant. These will provide you with a decent cooling solution and ensure fair value for your money.