Extended Life Antifreeze Coolants of 2025
Best Choice1
PrestonePrestone AF2100-6PK Extended Life 50/50 Antifreeze - 1 Gallon, (Pack of 6)
Main highlights- Protection against temperature extremes and rust corrosion of all cooling system metals, including aluminum; contains 30-50 ppm of denatonium benzoate as a bittering agent
- Prevents corrosion and helps keep cooling system running more efficiently
- Good for 5 years or 150,000 miles
- For use in all makes and models of cars and light duty trucks
- Compatible with any antifreeze/coolant, regardless of color
9.6Exceptional
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Value for Money2
HondaCoolant (Type 2)
9.9 Temperature control9.7 worth the money9.5 materials QualityWhy we love it
Extended life: 5 years/60,000 miles reliability.
Pre-mixed: No water needed, easy to use.
Extreme temperatures: Performs from -34 to 228 F.
9.4Excellent
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3
PEAKPEAK OET Extended Life Orange 50/50 Prediluted Antifreeze/Coolant for North American Vehicles, 1 Gal.
Why we love it
Compatible with multiple vehicle brands.
Long-lasting protection up to 400,000 miles.
Pre-diluted for easy use.
9.1Excellent
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4
PEAKPEAK FINAL CHARGE Global Extended Life Concentrate Antifreeze/Coolant for All Heavy Duty Engine Cooling Systems, 1 Gal.
Why we love it
Extended protection for heavy-duty engines.
Compatible with various engine types.
Enhances water pump seal life.
8.9Very Good
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5
PEAKPEAK OET Extended Life Blue Concentrate Antifreeze/Coolant for Asian Vehicles, 1 Gal.
Main highlights- PROTECTS: Advanced formulation prevents rust & corrosion protecting all cooling system components
- 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.
- DESIGNED FOR ASIAN VEHICLES: Recommended for use with Acura, Honda, Infiniti, Mitsubishi, Nissan, Subaru, and Suzuki vehicles that require a BLUE Phosphate-enhanced Organic Acid Technology (POAT) formula
- CONCENTRATED FORMULA: Ideal for flushing, filling, or topping off your cooling system
- 1 GALLON ENGINE ANTIFREEZE/COOLANT: Fully compatible with other extended life antifreeze/coolants. This item contains a bittering agent called Denatonium Benzoate.
8.7Very Good
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6
QuicksilverQuicksilver 877770Q1 Extended Life Coolant Anti-Freeze, Pre-Diluted 50/50 – 1 Gallon
Main highlights- Will not cause gelling
- Silicate and phosphate free
- Provides 5-year, 1,000 operating hour extended life protection
- Meets ASTM D-3306, ASTM D-4340 requirements
- For use in all MerCruiser closed cooling sterndrive or inboard gasoline engine applications
- Ethylene glycol based, pre-diluted to 50/50 mix with de-ionized water
- Compatible with conventional anti-freeze
8.4Good
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7
ACDelco16% OffACDelco 10-101 DEX-COOL Extended Life Coolant - 1 Gallon
Main highlights- OEM
- Contains A Bittering Agent
- ACDelco 10-101 DEX COOL (ORANGE)
8.3Good
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8
PEAKPEAK OET Extended Life Pink Concentrate Antifreeze/Coolant for European Vehicles, 1 Gal.
Why we love it
Compatible with other coolants.
Prevents rust and corrosion.
Ideal for European vehicles.
8.2Good
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9
ZerexZerex Extended Life Nitrite Free, Heavy Duty (HD) 50/50 Ready-to-Use Antifreeze/Coolant 1 GA
Main highlights- PROTECTS ALL COOLING SYSTEM METALS INCLUDING ALUMINUM and won’t harm gaskets, hoses or original vehicle finish
- PRE-MIXED YELLOW SOLUTION IS READY-TO-USE and comes in a 50/50 ratio with deionized water to eliminate the guesswork
- ORGANIC ACID TECHNOLOGY RESISTS CORROSION, SCALE AND RUST to protect diesel engines and ensure your antifreeze flows and functions properly.
- HEAVY DUTY FORMULA meets the harsher demands of heavy-duty diesel engines such as Cummins, DDC, International, Paccar, Volvo and Ford trucks
- Contains 30 – 50 ppm of denatonium benzoate as a bittering agent
- 10 YEARS/1,000,000 MILE GUARANTEE protects against engine failure caused by freeze-ups or boil-overs
7.9Good
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10
PEAKPEAK OET Extended Life Red/Pink Concentrate Antifreeze/Coolant for Asian Vehicles, 1 Gal.
Main highlights- PROTECTS: Advanced formulation prevents rust & corrosion protecting all engine cooling system components
- 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.
- 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
- CONCENTRATED FORMULA: Ideal for flushing, filling, or topping off your cooling system
- 1 GALLON ENGINE ANTIFREEZE/COOLANT: Fully compatible with other extended life antifreeze/coolants. This item contains a bittering agent called Denatonium Benzoate.
7.8Good
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