PEAK OET Extended Life Purple 50/50 Prediluted Antifreeze and Coolant for North American Vehicles, Long-Lasting Premium Engine Coolant/Antifreeze with Organic Acid Techology (Oat), 1 Gal.
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To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
In Stock.
Arrives
Sunday, May 17
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Style: 50/50
Features
- 1-GAL. EXTENDED LIFE PURPLE PREDILUTED ANTIFREEZE/COOLANT: Long-lasting antifreeze/coolant based on proprietary state-of-the-art organic acid technology (OAT) and is already prediluted to make topping off your cooling system a breeze
- UP TO 15 YEARS/350,000 MILES GUARANTEED: When installed as part of a complete flush and fill, PEAK guarantees this coolant will provide service life protection of up to 350,000 miles or 5 years
- OPTIMAL ENGINE PROTECTION: Each extended life coolant is formulated with the same corrosion inhibitor technology that protected your vehicle straight from the factory, preventing rust and corrosion to protect all cooling system components
- 50/50 PREDILUTED FORMULA: Already prediluted to make cooling system top offs easy to perform for North American vehicles requiring a purple OAT coolant
- FOR MODERN, HIGH PERFORMANCE NORTH AMERICAN VEHICLES: Ethylene glycol-based formula represents a carefully balanced mixture of organic acid corrosion inhibitors for complete protection of modern high-performance North American vehicle engines in newer Alfa Romeo, Chrysler, Dodge, Fiat, Jeep, and RAM vehicles
- This item contains a bittering agent called Denatonium Benzoate.
Manufacturer: PEAK
Brand: PEAK
Model: PEAK OET Extended Life Purple 50/50 Prediluted Antifreeze/Coolant for North American Vehicles, 1 Gal.
Item Weight: 9.31 pounds
Product Dimensions: 8 x 3.5 x 12 inches
Item model number: NAP5D3-AM3
Manufacturer Part Number: PEAK PURPLE
Date First Available: December 20, 2024
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sunday, May 17
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Style: Concentrate
Just flushed out my entire system. This is the recommended product for my radiator system and no issues to date. Working great heat hit 146 degrees which is extremely hot and well with in the correct temperature range. All sign point to good plus had plenty left over for the next time. You don’t have to but I distilled water for best results.
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Reviewed in the United States on October 28, 2025 by Ricky Johnson
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It's antifreeze, it works. Why we need 14 different types and colors I don't know. It was the antifreeze that my car calls for and for some reason I could only get pre-mixed purple in my local dealers. I wanted concentrate and it was available.
Reviewed in the United States on January 1, 2026 by Tom O'Connell
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The real stuff for jeeps
Reviewed in the United States on February 7, 2026 by shari1
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Works as it should
Reviewed in the United States on March 2, 2026 by scott
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its not overheating so I will call it a win, used this for an old car with unknown maintenance history, I have used peak for years and its always been great
Reviewed in the United States on October 9, 2025 by schutzen
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Works in my ram
Reviewed in the United States on January 28, 2026 by ghostman
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This PEAK OET Extended Life purple 50/50 antifreeze does exactly what it claims. It’s pre-diluted and ready to pour, making it easy to top off or fully replace coolant in North American vehicles. I’ve used it in GM and Chrysler vehicles with zero issues. The OAT formula ensures long-lasting protection, and the color makes it easy to identify. No overheating, no residue—just solid performance. Q&A Section: Q: Is this compatible with GM Dex-Cool systems? A: Yes, it’s designed for North American vehicles and works with systems requiring OAT or Dex-Cool. Q: Do you need to mix this with water? A: No, it’s 50/50 pre-diluted—just pour it in and go. Q: Is it safe to mix with other coolant types? A: It’s best not to mix coolant types. Drain old coolant before switching to this for best results. Q: How long does the protection last? A: It provides up to 150,000 miles or 5 years of protection under normal use.
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Reviewed in the United States on July 30, 2025 by Putty 802
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Works
Reviewed in the United States on January 30, 2026 by Brooke