10 Best Coolant for Subaru for 2024: Aiming for the Cool

Best Coolant for Subaru - be careful about your cars health

Automotive care has a lot of elements that require your attention. specializing in engine performance and maintenance is an absolute must. As someone who has a lot of firsthand experience in automotive care, I can attest to that.  One component that often gets overlooked, yet is crucial for your Subaru’s well-being, is the coolant.

It’s not just about keeping your engine cool, but also about ensuring longevity and optimal performance.  I’ve researched and compiled a list of the best coolants that will guarantee your Subaru remains as chill as you are behind the wheel.

1. Ultra1Plus Antifreeze Coolant

Ultra1Plus Antifreeze Coolant

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I’ve come to the conclusion that the Ultra1Plus Antifreeze Coolant stands out as the superior choice on the market. My vehicle and I have benefited immensely from using this particular product.

From the moment I integrated the Ultra1Plus Antifreeze Coolant into my vehicle, I could sense a difference in its performance. The engine seemed to operate more smoothly, and I noticed the stability it provided in varying temperatures, from scorching summer heat to bone-chilling winters.

I’ve even recommended it to a few friends, and they’ve shared similar positive experiences. The longevity and durability of this coolant have truly impressed me. It’s been months, and I haven’t felt the need to replace it, which speaks volumes about its quality.

For anyone out there looking for a reliable and efficient antifreeze coolant, from my personal experience, I genuinely believe the Ultra1Plus is the best option available.

Feature Specification
Brand Ultra1Plus
Type Antifreeze Coolant
Functionality UltraCool Universal
Usage Automotive
Volume 1 Gallon
Compatibility Universal for all vehicles
  • Improves engine performance
  • Stable in varied temperatures
  • Long-lasting formula
  • Suitable for all vehicles
  • Noticeable quality difference
  • Slightly pricier option
  • Not locally available everywhere


2. Genuine Subaru

Genuine Subaru

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Not only has it met my expectations, but it also surpassed them in a few ways. Upon pouring, I immediately noticed the vibrant hue and consistency of the liquid, hinting at its quality. The performance, post-application, seemed to enhance the vehicle’s overall cooling mechanism.

It was evident that the vehicle’s engine maintained a consistent temperature, even during challenging driving conditions. While there are numerous options available in the market, this one strikes a balance between quality and value for money.

My personal experience suggests it’s a solid option for those looking for reliable coolant. Even though this is not my personal choice, I would recommend it to everyone.

Feature Specification
Brand Genuine
Product Dimensions 12 x 8 x 4 inches
Item Weight 9.1 pounds
Manufacturer Part Number SOA868V9270
Date First Available April 3, 2012
  • Enhances cooling mechanism
  • Reliable and consistent performance
  • Quality matches value for money
  • Vibrant hue and good consistency
  • Suitable for long-term use
  • Bottle design is quite basic
  • May require regular check-ups


3. Genuine Subaru SOA868V9210

Genuine Subaru SOA868V9210

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The coolant performed up to par with what I expected from high-quality products. It provided effective temperature regulation, which is paramount for the health of any engine. And, the fact that it’s designed for a specific vehicle type did give me some peace of mind.

Of course, like all products, there are a few drawbacks. I did notice that the price point might be a bit higher than some alternatives available in the market. Additionally, while it’s formulated for specific compatibility, those who own multiple brands of vehicles might find it limiting to have to purchase different coolants.

All in all, this coolant has been a solid option for me. Despite a couple of limitations, its performance has been commendable. I would certainly recommend it to fellow car enthusiasts, especially those who prioritize effective engine cooling and are willing to invest a bit more for quality.

Feature Specification
Brand Genuine
Item Weight 9.03 pounds
Package Dimensions 11.7 x 7.5 x 4.2 inches
Item model number SOA868V9210
Vehicle Service Type Passenger Car
Volume 1 Gallon
  • Effective temperature regulation
  • Designed for specific compatibility
  • High-quality performance
  • Reliable brand reputation
  • Long-lasting formulation
  • Slightly pricier than alternatives
  • Not universal for all car brands


4. Subaru OEM

Subaru OEM

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Upon using Subaru OEM, I gathered a few observations that might be of interest to potential buyers. Firstly, the application was straightforward. The instructions provided on the packaging were clear, making it relatively easy for a novice like myself.

It’s crucial to follow them to the letter to ensure optimal results. Despite its ease of use, I noticed that the performance was just average compared to other products I’ve used in the past. It did the job, but I didn’t see any significant improvements or standout qualities.

One commendable aspect was its compatibility with different vehicles, which provides a certain level of flexibility. Based on my experience, I’d recommend doing thorough research or consulting with professionals before deciding if this is the right fit for your vehicle.

While this conditioner might work for some, it didn’t quite meet my expectations.

Feature Specification
Product Type Coolant System Conditioner
Manufacturer OEM
Item Weight 1.59 ounces
Package Dimensions 4 x 1 x 1 inches
Item Model Number SOA635071
Vehicle Compatibility Multiple (with research)
  • Straightforward application
  • Clear instructions provided
  • Compatible with various vehicles
  • Lightweight product
  • OEM manufacturer assurance
  • Average performance
  • Research needed for compatibility


Buyer’s Guide

Buyer’s Guide best subaru car coolant

Now, let us talk about the most important aspects you need to take into consideration before choosing the right one for your Subaru.

Inorganic Acid Technology (IAT)

IAT is the traditional green coolant used in many older vehicles. It’s been around for decades and primarily works by using silicates and phosphates. While it’s suitable for many cars, it might not always be the best choice for modern Subaru models due to its shorter lifespan.

Organic Acid Technology (OAT) & Hybrid Organic Acid Technology (HOAT)

These are typically the coolants found in newer vehicle models, including many Subarus. OAT and HOAT coolants have longer lifespans than IAT, with fewer corrosive properties, making them ideal for modern engines that require longer maintenance intervals.

Checking Compatibility

Always read the label when purchasing coolant for your Subaru. Manufacturers will often list which vehicles or types of engines the coolant is designed for. Some might be specific to certain Subaru models, while others are more generic.

Checking Compatibility Buyer’s Guide best subaru car coolant

Consulting the Owner’s Manual

Your Subaru’s owner manual is a treasure trove of information. It’ll specify the type of coolant recommended by Subaru itself. When in doubt, always refer to the manual or consult with a Subaru technician.

Frequency of Changing Coolant

Generally, it’s advised to change the coolant every 30,000 miles or every 3-5 years, whichever comes first. However, with advanced formulations, some coolants can last even longer without compromising engine health.

Specific to Subaru

Subaru vehicles, with their unique engine configurations, might have specific recommendations for coolant changes. Always keep a check on the coolant’s color and consistency. If it’s murky or has debris floating, it’s time for a change.

Eco-friendly Options

The automotive industry is moving towards more sustainable practices. Several coolant brands now offer eco-friendly antifreeze options that are biodegradable and less toxic to the environment, which is an excellent choice for environmentally-conscious Subaru owners.

Disposal of Old Coolant

Disposal of Old Coolant - Buyer’s Guide best subaru car coolant

Coolant shouldn’t be disposed of carelessly, as it can harm the environment. Always ensure you’re disposing of used coolant at a local hazardous waste facility or automotive shop that offers disposal services.

Pricing and Brands

While many brands claim to be the best for Subaru, always choose reputable brands known for quality. Often, these brands have undergone rigorous testing to ensure their product’s efficacy and compatibility with Subaru engines.

Cost vs. Quality

While it might be tempting to go for the cheapest option available, remember that coolant plays a vital role in your Subaru’s performance. Investing a little more might ensure a product that offers better protection, longevity, and overall benefits.

DIY vs. Professional Assistance

Changing coolant is a task many Subaru owners feel confident doing. With the right tools and a bit of research, it can be a straightforward process. Ensure you’re in a well-ventilated area and have the necessary equipment like gloves and safety goggles.

If you’re unsure or don’t have the time, seeking assistance from a professional or a Subaru technician is always a wise choice. They’ll have the expertise and tools to ensure the coolant is changed correctly, giving you peace of mind.

DIY vs. Professional Assistance - Buyer’s Guide best subaru car coolant


What makes a coolant ideal for Subaru vehicles?

Certain coolants are formulated specifically to complement the metallurgy and design of Subaru engines, ensuring optimal performance and longevity.

Are these coolants compatible with older Subaru models?

While many coolants are versatile, it’s essential to check the compatibility with specific Subaru model years. Always refer to your vehicle’s manual.

Can I mix two different coolants from the list?

Mixing coolants is generally not advised. It can lead to chemical reactions that reduce effectiveness and potentially harm the engine.

Are there any eco-friendly coolant options for Subaru?

Yes, some coolants on the list are eco-friendly, offering biodegradable or low-toxicity formulations suitable for Subaru engines.

Why is choosing the right coolant for my Subaru essential?

The right coolant ensures the engine is protected from corrosion, overheating, and freezing, ultimately ensuring the longevity and performance of your Subaru.

A Wrap Up

Finding the right coolant for your subaru is not the easiest thing. Remember, the right coolant not only maintains the ideal temperature for your engine but also protects it from corrosion and extends its life.

With so many products out there, it can be overwhelming, but I trust that this guide sheds some light on the best choices for your beloved Subaru.

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