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The Best Subaru Coolant Additive of 2023 – Reviewed and Top Rated

After hours researching and comparing all models on the market, we find out the Best Subaru Coolant Additive of 2023. Check our ranking below.

2,825 Reviews Scanned

Rank No. #1
Subaru OEM Coolant System Conditioner - SOA635071-2 Pack
  • Genuine Subaru part that fits your specific vehicle
  • Coolant System Conditioner
  • Part Number: SOA635071
  • Manufactured to meet specifications for fit, form, and function
Rank No. #2
Subaru SOA635071 OEM Coolant System Conditioner
  • LOWEST COST TO OWN
  • Subaru OEM Coolant System Conditioner
  • Part number: SOA635071
  • Package Weight: 0.091 kilograms
SaleRank No. #3
Subaru Genuine Super Coolant Blue Prediluted SOA868V9272 1 Gallon Pre Mixed 50/50 2009 and Newer Ascent BRZ Crosstrek Forester Impreza Legacy Outback WRX
  • Subaru Genuine Blue Super Coolant 1 Gallon
  • SOA868V9272 (NOW REPLACES SOA868V9270 )
  • Formulated for long-lasting corrosion and rust protection for all cooling system components, this prediluted antifreeze/engine coolant prevents the use of poor quality water that can lead to cooling system failure.
  • Provides cold-weather protection to -62° F
  • Protects against corrosion with organic corrosion inhibitor
Rank No. #4
Subaru Pre Mixed 50/50 Super Coolant - SOA868V9272 - Genuine OEM
  • Subaru Genuine Blue Super Coolant 1 Gallon
  • SOA868V9272 (NOW REPLACES SOA868V9270)
  • Formulated for long-lasting corrosion and rust protection for all cooling system components, this prediluted antifreeze/engine coolant prevents the use of poor quality water that can lead to cooling system failure.
  • Provides cold-weather protection to -62° F
  • Protects against corrosion with organic corrosion inhibitor
Rank No. #5
Genuine Subaru Cooling System Conditioner Coolant Head Gasket 12 Pack Case SOA635071
  • Used only with cars with green coolant .
  • Subaru Genuine Coolant Cond. SOA635071 X12 ( Case discount)
  • 1993-2008 Impreza Wrx STI
  • 1998-2008 Forester
  • 1990-2008 LEGACY and Outback
SaleRank No. #6
Valvoline Multi-Vehicle 50/50 Prediluted Ready-to-Use Antifreeze/Coolant 1 GA, Light Yellow/Green.
  • CONTAINS ALUGARD PLUS FOR COMPATIBLITY WITH ALL ETHYLNE GLYCOL-BASED COOLANTS in automobiles and light duty trucks.Fit Type: Universal
  • FIGHTS CORROSION, SCALING AND RUST while protecting all cooling system metals (including aluminum)
  • HIGH-QUALITY ADDITIVES PROTECT AGAINST LEAKS and won’t harm gaskets, hoses, plastics or original vehicle finish
  • PRE-MIXED YELLOW FORMULA IS READY-TO-USE in a 50/50 ratio with deionized water to protect all modern engine components from winter freezing (-34F) and summer boiling (265F).
  • To use it in all makes and models designed to use ASTM D3306
Rank No. #7
Royal Purple 01600 Purple Ice Super-Coolant Radiator Additive - 12 oz.
  • OPTIMIZES PROTECTION
  • Prevents erosion and electrolysis
  • Compatible with all coolants types
  • Contains lubricants to protect the water pump
  • Fit type: Vehicle Specific
Rank No. #8
EPAuto Spill Proof Radiator Coolant Filling Funnel Kit
  • Allows color matching of caps for dedicated adapters.
  • Cooling System fill kit prevents spills and trapped air. Trapped air pockets may cause erratic cooling system and heater performance.
  • 5” Extension Bar and 45° Elbow allow access to caps under shrouds or at an angle.
  • USPTO Patent No: US10519019B2
Rank No. #9
Subaru SOA868V9210 Coolant Antifreeze Green Long Life Gallon Genuine
  • SOA868V9210
  • Coolant
  • Genuine Subaru Parts
  • Compatible with vehicle type: all-terrain-vehicles;utility-vehicles;street-sport-motorcycles;off-road-motorcycles;street-cruiser-motorcycles;street-touring-motorcycles;street-motor-scooters;snowmobiles;marine-personal-craft
  • Included components: genuine subaru parts - coolant (soa868v9210)
Rank No. #10
PEAK OET Extended Life Blue 50/50 Prediluted Antifreeze/Coolant for European Vehicles, 1 Gal.
  • 1 GALLON ENGINE ANTIFREEZE/COOLANT: Fully compatible with other extended life antifreeze/coolants. This item contains a bittering agent called Denatonium Benzoate.
  • PROTECTS: Advanced formulation prevents rust & corrosion protecting all cooling system components
  • DESIGNED FOR EUROPEAN VEHICLES: Recommended for use with BMW, Jaguar, Volvo, and other European vehicles that require a BLUE Silicate-Enhanced Hybrid Organic Acid Technology (Si-HOAT) formula
  • GUARANTEED: When installed as part of a complete flush and fill, PEAK guarantees this coolant will provide service life protection of up to 150,000 miles or 5 years.
  • 50/50 PREDILUTED FOR QUICK TOP OFFS: Already prediluted to make topping off your cooling system a breeze
Rank No. #11
Mishimoto - MMRALC Liquid Chill Radiator Coolant Additive
  • Formulated to prevent future corrosion and reduce existing build-up
  • Decreases high coolant temperatures and does not require mixing
  • Net Weight: 4 fl oz. / Note: Non-corrosive 100% recyclable
  • Truck & SUV: 2 bottles / Sport Compact Cars: 1 bottle / ATV & Dirt Bike: 1oz per qt
  • Mishimoto Lifetime Warranty
Rank No. #12
Hy-Per Lube HPC100-3PK High Performance Super Coolant - 16 oz, (Pack of 3)
  • Reduces Engine Cylinder Heat Temperatures
  • Allows Safe Advancement of Ignition Timing Resulting in More Horsepower
  • Prevents Overheating in High Performance and High Load Engines
  • Complete Protection from Rust, Corrosion and Electrolysis
  • Compatible With All Types of Antifreeze, does not contain ethylene glycol
Rank No. #13
WIX Filters - 24106 Coolant Test Kit, Pack of 1
  • Package Dimensions: 10.16 cms (L) x 5.08 cms (W) x 6.096 cms (H)
  • Product Type: Auto Part
  • Package Quantity: 1
  • Country Of Origin: China
Rank No. #14
Zerex Valvoline DEX-Cool Organic Acid Technology Concentrate Antifreeze/Coolant 1 GA
  • UNSURPASSED FREEZE PROTECTION AND ANTI-BOIL PERFORMANCE outperforms industry standards
  • ORGANIC ACID TECHNOLOGY RESISTS RUST, SCALE & CORROSION while protecting all cooling system metals (including aluminum)
  • HIGH-QUALITY ADDITIVES PROTECT AGAINST LEAKS and won’t harm gaskets, hoses, plastics or original vehicle finish
  • ORANGE CONCENTRATE FORMULA should be mixed with clean tap water or demineralized water at 50/50 ratio for temperatures -34 to 265F; 60/40 for -62 to 270F; and 70/30 for -84 to 267F
Rank No. #15
PEAK OET Extended Life Red/Pink 50/50 Prediluted Antifreeze/Coolant for Asian Vehicles, 1 Gal.
  • 1 GALLON ENGINE ANTIFREEZE/COOLANT: Fully compatible with other extended life antifreeze/coolants. This item contains a bittering agent called Denatonium Benzoate.
  • PROTECTS: Advanced formulation prevents rust & corrosion protecting all engine cooling system components
  • DESIGNED FOR ASIAN VEHICLES: Recommended for use with Lexus, Scion, and Toyota vehicles that require a RED/PINK Phosphate-Enhanced Organic Acid Technology (POAT) formula
  • GUARANTEED: When installed as part of a complete flush and fill, PEAK guarantees this coolant will provide service life protection up to 150,000 miles or 5 years.
  • 50/50 PREDILUTED FOR QUICK TOP OFFS: Already diluted to make topping off your cooling system a breeze
SaleRank No. #16
Bar's Leaks High Mileage Cooling System Repair
  • Stops Cooling System Leaks
  • Compatible with all brands of anti-freeze including conventional green or blue and extended life red/orange or yellow (OAT/HOAT) coolant
  • Premium Carbon Fiber Formulation For Extended Protection
  • Stops cooling system leaks
Rank No. #17
Cylinder 4 Coolant Mod Compatible with Su-baru WRX STI EJ20 EJ25 2002-2020
  • Cylinder 4 Coolant Mod for Subaru EJ Engines was designed to increase coolant flow to cylinder #4 head area.
  • The additional coolant flow helps reduce cylinder #4 coolant temps and keeps the temps more uniform with the rest of the cylinders.
  • This helps reduce knock and detonation in cylinder #4, which is known to cause the dreaded EJ ringland failure
  • Compatible with All EJ20 / EJ25 engines,2002 - 2014 Subaru WRX,2004 - 2020 Subaru STI,2004 - 2008 Subaru Forester XT,2005 - 2009 Subaru Legacy GT
  • Package Inlucidng: 1X Cylinder 4 Coolant Mod,1X T Fitting,2X Clamps,Just as picture shown
Rank No. #18
Dorman 603-757 Front Engine Coolant Reservoir Compatible with Select Subaru Models
  • Direct replacement - this engine coolant reservoir matches the fit and function of the original part
  • Ideal solution - engineered for a seamless installation
  • Durable construction - manufactured from quality materials to withstand underhood heat and vibration
  • Trustworthy design - backed by 100 years of automotive aftermarket experience
  • Ensure fit - to make sure this part fits your exact vehicle, input your make, model and trim level into the garage tool
SaleRank No. #19
Zerex Asian Vehicle Green Silicate and Borate Free 50/50 Prediluted Ready-to-Use Antifreeze/Coolant 1 GA
  • UNSURPASSED FREEZE PROTECTION AND ANTI-BOIL PERFORMANCE outperforms industry standards.Fit Type: Universal
  • PHOSPHATE ADDITIVES SAFEGUARD AGAINST CORROSION, SCALE AND RUST while protecting all cooling system metals (including aluminum)
  • HIGH-QUALITY ADDITIVES PROTECT AGAINST LEAKS and won’t harm gaskets, hoses, plastics or original vehicle finish
  • PRE-MIXED GREEN FORMULA IS READY-TO-USE in a 50/50 ratio with deionized water to protect all modern engine components from winter freezing (-34F) and summer boiling (265F).
Rank No. #20
SWANLAKE No-Spill Coolant Funnel Kit,Spill Proof Radiator Funnel Bleeder with Adapters.Universal Fitment15Pcs.
  • The Spill Proof Radiator Coolant Filling Funnel Kit can deliver fluids like radiator coolant and oil to any vehicle, the long burp funnel prevents spills and trap air during refills after a coolant flush.
  • This coolant funnel has a special rotary switch ,different than others, which helps us effectively to control stopping overflow or bubbles.and we marked scale on funnel.
  • The long extension rod is specific made for difficult-to-reach area , it could be used at any angle.The thread reinforcement design make sure the liquid wont leak in any situation.
  • The multipurpose funnel kit contains 5 Adapters, 4 Filler Caps, Two 45° elbows, Two 5“ extender and a thick transparent antifreeze funnel .
  • The Spill Free Funnel is perfect for engine flushing, coolant pressure tester kit , even radiator flushing; it works for American and other vehicles.

Last update on 2023-07-30 / Affiliate links / Product Titles, Images, Descriptions from Amazon Product Advertising API

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We provide an Subaru Coolant Additive buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information. How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available Subaru Coolant Additive currently available on the market.

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  1. Brand Value: Every brand of Subaru Coolant Additive has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an Subaru Coolant Additive?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your Subaru Coolant Additive.
  5. Customer Ratings: Number ratings grade Subaru Coolant Additive objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their Subaru Coolant Additive.
  7. Product Quality: You don’t always get what you pay for with an Subaru Coolant Additive, sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an Subaru Coolant Additive is should be an indication of how long it will work out for you.

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FAQ:

Q: Where can I get coolant for my Subaru truck?

A: Best Antifreeze / Coolant for Subaru Cars, Trucks & SUVs AutoZone offers Free In-store Pickup for Subaru Antifreeze / Coolant. Order yours online today and pick up from the store.

Q: What does a Subaru cooling system conditioner do?

A: The SUBARU cooling system conditioner is a product intended to be added to the engine coolant when it is changed. We have photos here. What SUBARU vehicles require the cooling system conditioner?

Q: Can a Subaru head gasket be used to change coolant?

A: Subaru knows why they made this product. They have had way too many issues with Head gaskets on various vehicles for many years. This additive might work for you if you have external small leak, I would definitely use it when changing coolant. But my 2003 Forester had an internal leak and it didn’t work at all.

Q: Can you change the coolant on a Subaru Forester?

A: Subaru engines are notorious for blowing head gaskets and this is the OEM fix. Change the coolant and throw this bottle in. Its been working on my 2003 Forester amd never blew a gasket. expensive stuff, hopefully it makes a difference. Quick delivery and good price.

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