5 Best Coolant Reviews 2019 | Protect The Engine From Overheating

If you’re going to take care of your car properly, you need to spend time and effort trying to find the best coolant for your needs. Even the most uninformed about cars know that a car engine can get terribly hot, but having a radiator with water in it just won’t cut it. You need coolant liquid in your radiator to keep the engine from overheating.

Top 3 Coolants

4.5/5

  • It works as antifreeze and coolant
  • You can use this for gas and diesel engines
  • It is safe for the environment

4.8/5

  • It’s premixed​
  • It can deal with really high or really low temperatures​
  • It’s recommended for many vehicle brands.

4.4/5

  • It boils at 375 degrees F and it can protect at low temperatures like -40 degrees F
  • You can use it for many types of engines 
  • It’s already premixed

So is engine coolant antifreeze? Liquid coolants are also often referred to as antifreeze, and that’s because they can also keep your engine from freezing during the winter months. However, for this purpose you may want to look for the best antifreeze that can work much more effectively in extreme weather conditions.

What to Look for when Buying the Best Coolant

So how exactly are you to find the best antifreeze coolant for your needs? What kind of engine coolant should I use? If I have a truck, what kind of coolant do I need? Aren’t they all the same? No, these coolants aren’t interchangeable, and some are much better than others.

If you want to pick a coolant for yourself, you should concentrate on the following factors to make your choice:

The Right Formula

If you don’t use a coolant with the right formula, you may do more harm than good. In fact, you may end up causing severe damage to your car engine. This is why this factor is listed first—it’s the most important consideration.

That’s why it’s imperative to check your car owner’s manual to see if it recommends a specific brand of coolant for your radiator. That’s a safe way to do it.

At the very least, you need to know if the coolant you’re buying will be suitable for the type of engine you have. Some are for gasoline engines, while others are for diesel engine. Some can be used for both types. Some coolants are for passenger cars, while others are for light trucks or for heavy duty vehicles.

Coolant Operating Temperature

Coolants need to be able to handle high temperatures. Normally, this means they should be able to deal with up to 200 degrees F or even more. But the coolant should also be able to handle low temperatures as well to act as antifreeze, so they should be able to withstand low temperatures of down to -20 or even -30 degrees F.

Environmental Friendliness

Many of us are now much more aware of how toxic automobile wastes can be hazardous to the environment. You should also check to see if the coolant is free of toxic compounds. There shouldn’t be any lead, mercury, or heavy metals.

Many high-end coolant manufacturers now tend to use propylene glycol, instead of ethylene glycol which can lead to lots of environmental hazard. Others even refrain from using glycol compounds altogether, resorting to high-efficiency substances based on nitrite.

You may want to see if it’s approved or certified by reputable automotive organizations. Reviews from car owners can also help, as they can report the effects of the coolant on their cars.

Premixed or Not

Some coolants have already been premixed, so all you need to do is to just pour it into your radiator. But others are in concentrated form, which means you may get greater amounts of coolant for your money. It’s just that you first have to mix it correctly with the right amount of distilled water.

Cost

Prices of coolants can vary widely. Some cost only $20 or so (or even cheaper), but others may cost as much as $100. You also have to think about value for money, since the more expensive coolants may only be a little bit better than other coolants with much lower prices.

Best Engine Coolant Recommendations

Even knowing what factors to consider when buying a coolant for your car may not be enough to help you make a choice quickly. So to help speed the process along, here are some options you may want to consider for your particular circumstances:


4.5/5

As this Valvoline Zerex G-05 is concentrated antifreeze and coolant, you will need to mix this with distilled water yourself. You can mix the Zerex coolant with an equal part of water for a 50% concentration, and it will be enough to keep your engine from boiling over in the summer or freezing in the winter. But it’s best if you get a 50% to 70% concentration range of the G-05 coolant to also protect your engine from corrosion.

The G05 coolant formulation is good for both gasoline and diesel engines. It has low levels of silicate, reduced pH, and no phosphate. It contains nitrite which protects cylinder liners of your diesel engine from cavitation. Other additives to the formula protects from hard water deposits and scale.

The formula is very safe for your components, so it will not damage plastics, hoses, or even the original finish of your vehicle. The G-05 antifreeze is approved for the newer Ford North America models, and it also meets numerous antifreeze specifications.  

Things We Liked

  • It works as antifreeze and coolant
  • You can use this for gas and diesel engines
  • It is safe for the environment
  • check
    It protects against corrosion and hard water deposits

Things We Didn't Like

  • You need to get the mix right, using the right type of water

4.8/5

This Mopar 10 Year/150,000 Mile Coolant 50/50 Premixed is a bit more expensive, but you get good value for money right away because it’s premixed. You won’t have to worry about getting the mix right. But that’s not the only reason that just about every customer review gives it a perfect score.

It’s a very good buy, and in fact quite a few owners’ manuals specify its use. It is recommended for vehicles made by Fiat, Alfa Romeo, Dodge, Jeep, SRT, Ram, Lancia, Abarth, and Chrysler.

If your engine specifically needs OAT (organic acid technology) coolant, you can get this. It’s sometimes known as Dex cool engine coolant. Just make sure you don’t mix it with HOAT (Hybrid Organic Acid Technology) coolant. That’s a mix that’s bad for your engine. Just learn the coolant color meaning so you can avoid mixing these coolants.

Its temperature range is impressive too. It can deal with up to 265 degrees F, and down to -34 degrees F. There’s nothing to it, as you just pour this car antifreeze and you’re good for summer and winter.

Things We Liked

  • It’s premixed
  • It can deal with really high or really low temperatures
  • It’s recommended for many vehicle brands

Things We Didn't Like

  • You have to be careful mixing this with other coolant brands

4.4/5

Some engines can get a lot hotter than what other coolants can handle, which is why you need a high performance engine coolant like the EVANS Cooling Systems EC53001. You can use this for gasoline engines, whether you have them in modern or vintage cars. It’s the only BMW approved coolant that’s waterless. This can also be used for light-duty diesel engines, and even for LPG and CNG vehicles.

If you tend to like speeding up a lot, you may read a lot of octane booster reviews, then this is the best coolant for your driving style. Unlike other coolant types, this is tough enough that the boiling point of the antifreeze is 375 degrees F. It won’t vaporize, so you don’t get any boil-over.  It also generates low vapor pressures so it prevents coolant loss and minimizes the strain on the components of your cooling system. This can also protect down to -40 degrees F when you use it as antifreeze during the winter.

This is waterless, so that means corrosion is eliminated as a potential problem. You also don’t get any electrolysis issues, and its use minimizes your maintenance costs, this also improves the engine’s combustion efficiency, so you get better fuel economy and more power from your engine. Consider this coolant while you also search for the best catalytic converters.

All these features make it easy to understand why a lot of people regard this as their personal best engine coolant. Just be sure that you remove all the water-based coolants first before you pour this in. It’s not going to work well if you don’t.

Things We Liked

  • It boils at 375 degrees F and it can protect at low temperatures like -40 degrees F
  • You can use it for many types of engines
  • It’s already premixed
  • check
    It improves engine performance and efficiency

Things We Didn't Like

  • You have to be careful to remove all of the old water-based coolant from your engine

3.9/5

Do you have a leak in your coolant system? If so, you may want to think about pouring in this K-Seal ST5501 as your coolant leak repair option. This is the antifreeze for car you need if you have a leak, though you actually mix this with your antifreeze. You don’t have to drain or flush your coolant system, since it works with all antifreeze types.

Using it isn’t all that complicated either. Basically, you just need to shake the container first, and then you pour it down your coolant system. That’s enough to fix any leaks and cracks in your radiator and other components. These include your engine blocks, water pump casing, heater core, cylinder heads, freeze plugs, and head gasket.

This isn’t a temporary measure until you get to a mechanic either. You’re the mechanic, since using this gives you a permanent repair solution. It works best when you identify the leaks as soon as possible, since you don’t wait to let the problem get worse. The leak should not exceed .635mm in size, because the particles in the K-Seal are also just small enough that it won’t block the tubes and passageways in the cooling system.

Things We Liked

  • This fixes leaks in the head gasket, engine block, water pump, and radiator
  • This is a permanent solution and not a stopgap measure
  • It’s easy to use—you just shake and pour
  • check
    It works with all antifreeze brands

Things We Didn't Like

  • It can get a bit more complicated if you have a head gasket leak and your coolant system is also over-pressurized

4.8/5

This Genuine Mopar Fluid 68048953AB Antifreeze/Coolant is the original version, and this time it’s for 5 years or 100,000 miles. You can understand why we think the Mopar 10 Year/150,000 Mile Coolant is a better option. But virtually all the people who have used this love it and you can see that for yourself if you read the many online customer reviews.

This is the recommended best antifreeze coolant for Chrysler Mopar vehicles. Use it for your Jeep and you’re good to go. It’s also for Dodge and Ram vehicles.

There’s nothing to this. All you need to do is to mix this properly with water, and with the right concentration you get the protection you need. At 50% concentration, it protects from -34 degrees F to 265 degrees F. But increase the concentration to 70% and you boost the temperature range, from -84 degrees F to 276 degrees F. this also protects against corrosion.

It’s a genuine Mopar antifreeze and coolant, and that’s always a mark of high quality. Ordering this online is also a much better option, since you won’t have to overpay your local dealer. It’s not a cheap coolant, but it’s not expensive either.

However, you don’t want to mix this with regular antifreeze (with the green color). This will reduce the capacity of this product, and instead of one of the best engine coolant brands you get a regular cheap antifreeze protection.

Things We Liked

  • You get great temperature range protection
  • You can mix this yourself to get the temperature range you want
  • It provides terrific corrosion protection

Things We Didn't Like

  • You have to change coolant in 5 years, not 10
  • Updated July 5, 2019