12 Best Antifreezes & Coolants of 2021

Jerry Wilson
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Over the last decade or so, antifreeze solutions and coolants have evolved dramatically for the better. After much research I have put together this list of the best (and most environmentally friendly) engine coolants and antifreezes on the market.

These best coolants can be used in both modern and classic cars, trucks, SUVs, vans, motorcycles and marine engine vehicles.

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NameCategoryProduct
Honda Genuine COOLANTBest OverallHonda Genuine COOLANT
Valvoline Multi-Vehicle 50/50 Prediluted Ready-to-Use Antifreeze/Coolant 1 GABudget PickValvoline Multi-Vehicle 50/50 Prediluted Ready-to-Use Antifreeze/Coolant 1 GA
STAR BRITE Star-Cool Premium Synthetic PG Engine CoolantUpgrade PickSTAR BRITE Star-Cool Premium Synthetic PG Engine Coolant

1. Honda Genuine COOLANT

Our rating: 9 / 10

Honda Genuine COOLANT

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Pros:

  • Long Life Span
  • Provides Superior Performance
  • Does not Leak

Cons:

  • Not Environmentally Friendly
  • Limited to Certain Make and Models
  • Not Available in All Areas

The Genuine Honda Coolant is a great option for those looking to change the antifreeze in their Honda Engine. What makes this option stand out is the 20 year life span and the fact that it performs better than most other antifreezes. The Genuine Coolant is one of the best coolants you can find and will help you to keep your vehicle running in its prime for as long as possible.

The Genuine Honda Coolant does not leak out of your vehicle and provides a more efficient cooling process. However, it is not environmentally friendly and should not be used by people who are looking to be more environmentally friendly. If you are interested in mixing it yourself or using another option than the Genuine Honda Coolant, you can find the same coolant in a gallon sized container.

2. Aisin ACT002 Anti-Freeze

Our rating: 9 / 10

Aisin ACT002 Anti-Freeze

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Pros:

  • Crystal clear for easy checking
  • No corrosion
  • Superior corrosion protection
  • Superior anti-corrosion protection
  • Tin plated to protect your radiator
  • Protects against rust corrosion
  • Anti-corrosive and anti-freezing
  • Leak-proof
  • Won’t harm PAG oil

Cons:

  • Contains no PTFE, no silicone or other harmful anti-freeze additives
  • Its low boiling point might pose a problem in colder conditions
  • Contains lead and phosphate, which is bad for the environment

This product comes in a 2 gallon capacity. Since it’s completely biodegradable, it’s very eco-friendly as well. The product is approved for use in all vehicles, both gasoline- and diesel-powered.

This product is intended for use in older vehicles. However, the formula has been updated to include additional corrosion inhibitors and anti-freeze agents designed for modern vehicles.

You are advised to check with your owner’s manual or the car’s manufacturer to ensure that this product is OK for your vehicle, but generally speaking it’s compatible with all gasoline and diesel-powered vehicles.

3. Genuine Ford Fluid VC-7-B Gold Concentrated Antifreeze/Coolant

Our rating: 9 / 10

Genuine Ford Fluid VC-7-B Gold Concentrated Antifreeze/Coolant

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Pros:

  • Extremely effective in preventing corrosion
  • One of the best coolants available on the market today
  • Very easy to mix the coolant with water

Cons:

  • Not easy to find in certain parts of the US
  • It is difficult to determine when it has to be changed

This coolant is one of the best options available in the market today. When mixed with water, it turns into a noncorrosive flood with the blue color. This product also ensures that the engine parts are in perfect working condition. This is the concentrated version and you are advised to dilute it with water before you put it into use. This coolant is compatible with both diesel and petrol engines. The company claims it to be an improved one.

This coolant is odorless, hence, it doesn’t irritate the worker. You are using this product at your own risk. You are advised to wear gloves while using this coolant. The coolant is safe for recycled oil. You need to pour it in the engine as soon as it is restored. Nowadays, some coolants need to be transferred regularly. But this product is different in this regard. Basically, it stays longer in the engine and works better as compared to other products in the market.

The companies have added a label on the can which is extremely helpful when pouring out the coolant in the engine.

4. Genuine Ford Fluid VC-3DIL-B Orange Pre-Diluted Antifreeze/Coolant

Our rating: 9 / 10

Genuine Ford Fluid VC-3DIL-B Orange Pre-Diluted Antifreeze/Coolant

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Pros:

  • Cleans coolant, inhibits corrosion, and protects against rust and corrosion
  • Keeps engine temperatures cold in extreme weather conditions
  • Easy to mix and use
  • Does not cause foaming or excessive corrosion
  • Saves you money
  • Does not damage aluminum head gaskets like other antifreezes on the market

Cons:

  • Little to no color change after expansion
  • Not for use in aluminum radiator systems
  • Does not freeze proof

The Genuine Ford Fluid VC-3DIL-B is a pre-diluted antifreeze/coolant that cleans coolant, inhibits corrosion, and protects against rust and corrosion. It keeps engine temperatures cold in extreme weather conditions, and provides long-life corrosion protection. The VC-3DIL-B coolant cleans and protects Ford’s side-flow aluminum engines, block cast iron engines, and cylinder heads.

It can be used in all Ford vehicles with a 3-point antifreeze protection system. If you’re using this coolant in a Ford system that has block cast iron engines, the coolant will clean the block while protecting cast iron from corrosion.

This coolant is not compatible with aluminum radiator systems or with stock radiators, and should not be used in these instances.

5. OEM Recochem 86-324BOEME Blue Premium Antifreeze 50/50 Extended Life-Euro I Blue

Our rating: 9 / 10

OEM Recochem 86-324BOEME Blue Premium Antifreeze 50/50 Extended Life-Euro I Blue

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Pros:

  • Fast acting
  • Extended life span
  • Small amount needed for top-up

This full-synthetic water-reducing coolant delivers unbelievable protection to vital engine parts against rust and corrosion up to a maximum of 180,000 miles. And along with its other features, it also maintains all other fluids in your vehicle properly as well. This coolant is tested for quality and effectiveness, and has a protection period of three times as long as the regular concord ones. The formula of this coolant is vegan and botanically derived, and it’s easily biodecompatible with all metals, rubber, plastics and other materials. Its color is a brilliant blue which is very attractive and appealing. What’s more, this coolant is also an antifreeze.

Since this coolant is manufactured and tested in Europe, you may need a convertor cap to fit in your car when installing it. This coolant is the latest in coolant technology, and it’s the way forward if your car is due for a top up. It’s sold in a 2L bottle, so you’ll have enough to keep all you fluids warm and protected for miles ahead.

6. Engine Ice TYDS008 High Performance Coolant

Our rating: 9 / 10

Engine Ice TYDS008 High Performance Coolant

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Pros:

  • Prevent sludge, corrosion, and rust buildup
  • Improve engine performance
  • Prolong engine life

Engine ice is a coldant that works to protect your vehicle's engine from corrosion, cavitation, and heat retention as well as from freezing in adverse weather conditions. Engine ice is made by adding a powerful dose of biocides, corrosion inhibitors and dispersants that are blended together. Engine ice is non-toxic and can retain its characteristics even after freezing.

This product is used to liven up the engine's life when it is in poor condition and functions as protection when the engine is exposed to extreme weather conditions as it retains the engine from freezing. The engine performance can be improved by using this product and the engine life is prolonged.

7. Zerex Original Green Antifreeze/Coolant 1 GA

Our rating: 8 / 10

Zerex Original Green Antifreeze/Coolant 1 GA

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Pros:

  • Good change in viscosity over regular antifreeze
  • Less expensive than most coolants
  • Low VOC

Cons:

  • Toxic fumes
  • Relatively low freeze protection

This coolant stands up to the competition, with a lower cost and propellant-free technology. It is non-toxic and biodegradable, too. The COA (certificate of analysis) revealed that the freeze protection is at -34 degrees Fahrenheit. It has a high viscosity index and is compatible with ethylene glycol, the more popular coolant.

The Zerex Original Green Antifreeze/Coolant is made with Proprietary Zerex Accumulator Technology to give you excellent protection against corrosion and prevent leaks. The product can be used in your cars, trucks, and SUVs. It is compatible with plat and aluminum, perfectly safe to use in your other devices, and won’t harm your factory components. It is compatible with most vehicles and is available in 1 gallon jugs or 1 gallon containers at prices most consumers can afford.

8. Valvoline Multi-Vehicle 50/50 Prediluted Ready-to-Use Antifreeze/Coolant 1 GA

Our rating: 8 / 10

Valvoline Multi-Vehicle 50/50 Prediluted Ready-to-Use Antifreeze/Coolant 1 GA

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Pros:

  • Can be poured right in the radiator
  • Prevents car from freezing up
  • Good value for the money
  • Low VOC content

Cons:

  • Needs to be stored in a cool, dry place
  • Takes a while to cool down

By now most of you know how important coolant is to keeping your car in working order. The unfortunate truth is that it can be a very expensive part of keeping your car going. Valvoline has wide variety of coolants including the Multi-Vehicle 50/50 Prediluted Ready-to-Use Antifreeze/Coolant with 1 gallon storage and handling cap.

This particular coolant can be poured right into your radiator, thus making it a quick start in this department. It provides you with the optimal mixture of corrosion protection and season-long protection against freezing, which is great for those who live in colder climates.

9. STAR BRITE Star-Cool Premium Synthetic PG Engine Coolant

Our rating: 8 / 10

STAR BRITE Star-Cool Premium Synthetic PG Engine Coolant

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Pros:

  • Cost-efficient
  • High corrosion resistance
  • No color changes

Cons:

  • Does not mix well, often clumping
  • High viscosity
  • Hardening over time

Pure White.

This is a rather unique choice to say the least. Most of the products featured in our top product lists are high quality, lower cost alternatives to most brands. This choice on the other hand is just poorly executed.

STAR BRITE’s STAR-COLD Premium Synthetic PG Engine Coolant – 1 Gallon, Pure White is their premium product and aims at quality in its design and execution. This is by far their worst option in my opinion, as it suffers from poor packaging, metal flakes in the fluid, water contamination, scractches, and engineering.

10. Havoline Xtended Life Antifreeze/Coolant Pre-mix 50/50

Our rating: 8 / 10

Havoline Xtended Life Antifreeze/Coolant Pre-mix 50/50

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Pros:

  • Reduces mixing time, hardening, and color separation in comparison with regular coolants
  • Soluble in water
  • Improves stability, insurance penetration, anti-corrosion, and winter driving qualities
  • No residue left in the engine, cleaner engine compartment, less tank cleaning
  • Contains corrosion and rust inhibitors, and a fluorescent dyes to locate leaks

Cons:

  • Might increase evaporation in the air conditioning system.
  • Conclusion: This is my top pick among all the antifreezes and coolants. It’s a great antifreeze at a great price. It’s a pre-mixed version so it makes use of easy funnel opening and pouring.

The Havoline Xtended Life antifreeze is solubilized for use in the cooling system of your car even if it’s a pre-mixed 50/50 solution.

It’s worth mentioning that this antifreeze was formulated to make use of easier handling characteristics. That’s why it’s recommended that you use the product as is without further diluting it.

This will reduce possible color separation from water and hardening in the tank.

11. Zerex DEX-COOL Organic Acid Technology Antifreeze/Coolant 1 GA

Our rating: 8 / 10

Zerex DEX-COOL Organic Acid Technology Antifreeze/Coolant 1 GA

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Pros:

  • Better rust and corrosion protection
  • Is compatible with petroleum and non-petroleum based antifreezes
  • Zero EPA HS/Score
  • Breaks down 100% biodegradable

Cons:

  • Will cost more than traditional green coolants
  • Must ensure proper usage for this to function properly

Zerex has been around for nearly 100 years and they are renowned for their quality products. Their reputation for unbiased testing and performance is why I’ve included their DEX-COOL Organic Acid Technology in this list of the best antifreezes.

What stood out to me was its formulation of Organic Acid Technology, which is recommended for cars that have been running for 100,000 miles or more. Most manufacturers recommend checking your coolant every two years, and this is the coolant of choice for most OEMs.

This should be part of your normal, preventative maintenance, ensuring your engine will stay in optimum working condition for many miles to come. The F-Sol-02 formula helps clean out your cooling system and drains away sludge, rust, and corrosion. This also helps to prevent damage from overheating and prevents freezing.

12. Zerex G05 Phosphate Free Antifreeze/Coolant 1 GA

Our rating: 7 / 10

Zerex G05 Phosphate Free Antifreeze/Coolant 1 GA

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Pros:

  • Water-based formula
  • Protects all systems
  • Phosphate free
  • Excellent physical properties
  • Environmentally friendly
  • Resistant to rust & corrosion
  • Safe for use as drinkable water

Cons:

  • Leaks if used on A/C seams
  • Bulky
  • May freeze at higher temperatures

The Zerex G05 is the best for all around coolant service from budget cars to the sports car crowd.

It ‘s ultra-pure and contains no glycol, detergents, or silicates, which makes it ideal for all cooling system and engine parts and doesn’t leave a residue build-up.

The IPA Potassium Nitrite formula provides great corrosion protection and heat transfer properties. Phosphate-free formula is less likely to corrode aluminum and brass engine components, water pumps, gaskets, and hoses.

Frequently Asked Questions (FAQ)

What color is Mitsubishi coolant?

The good news is that Mitsubishi coolant color is red. After hundreds of reports, our research has shown that it usually is a bright or deep orange red.

All coolants contain a special solvent that helps it to sink into component crevices and absorb operating heat. This is a long-lasting, durable coolant that prevents corrosion of components for long periods of time.

The glycol coolant works to prevent freezing and protect against overheating at the same time.

Glycol coolants are available in various types, and this complete antifreeze and engine coolant additive package is compatible with the following types:

  • DexCool
  • EWG320A
  • BG44K
  • BG44L
  • BG46K
  • BG46L
  • BG46A
  • BG46G
  • ATF
  • WRVS318
  • WRVS246
  • HFC-134a

What is the best antifreeze on the market?

  • For use in Mercury Marine outboard and sterndrive engines
  • Also suitable for use in 2-stroke engines
  • Gives fast freeze protection
  • Inhibits corrosion in water pumps, cooling systems, and exhaust manifolds
  • Protects from rust, corrosion, and deposits
  • Can be used in any brand and model of marine engines
  • FDA and Health Canada approved and meets all environmental regulations
  • Water soluble formula is compatible with all antifreeze

Does it matter what brand of coolant I use?

If you were to ask what brand of coolant to use, many mechanics would say that the brand of coolant does not matter. It all comes down to the quality of the coolant. Some brands include instructions for vehicle-specific use. If you have a quality coolant, it can be used in most vehicles. Just make sure to always read the instructions.

If you’re wondering which brands to avoid, you’ll want to beware of the following:

No-name brand coolants or products that do not include a manufacturer. Rely on reputable brands for a quality product.

Coolants with acid content. These coolants can eat away at your car’s components and can be very dangerous. Avoid them at all costs.

Coolants that include all organic additives. Their inclusion may cause your coolant to corrode rapidly.

What color is most engine coolant?

The majority of engine coolants available comes as greenish, bluish or brownish liquid that is tinted and greenish in color.

In very rare cases (usually for older vehicles), it can be black, as it was in the past.

The color has no impact on its efficiency nor the quality of the engine coolant.

Most of the coolant products available are in a concentrated form with roughly 50/50 mix. The directions will usually recommend that you mix it with water and check the temperature periodically to add more if needed.

Conclusion

This is the definitive guide to the best antifreezes of 2021. We’ve taken the time to research the best products available based on a wide variety of factors. If you’re shopping for the best coolants and antifreezes for your vehicle, we hope this guide will help you narrow down your choices and find the right product to meet your needs.

Our Recommendation

NameCategoryProduct
Honda Genuine COOLANTBest OverallHonda Genuine COOLANT
Valvoline Multi-Vehicle 50/50 Prediluted Ready-to-Use Antifreeze/Coolant 1 GABudget PickValvoline Multi-Vehicle 50/50 Prediluted Ready-to-Use Antifreeze/Coolant 1 GA
STAR BRITE Star-Cool Premium Synthetic PG Engine CoolantUpgrade PickSTAR BRITE Star-Cool Premium Synthetic PG Engine Coolant