PEAK OET Extended Life Pink 50/50 Prediluted

PEAK OET Extended Life Pink 50/50 prediluted antifreeze/coolant is a silicate-free OAT formula engineered to protect European cooling systems up to 150,000 miles or 5 years when installed after a full flush and fill.

Designed for many European makes that specify a pink, silicate-free Organic Acid Technology (OAT) coolant, this 1 gallon bottle arrives pre-mixed 50/50 with deionized water for immediate top-offs or straightforward refills. The formulation contains corrosion inhibitors tailored for aluminum and mixed-metal systems, plus a bittering agent (Denatonium Benzoate) to discourage accidental ingestion. Compatible with other extended life coolants, it helps maintain system integrity while reducing the need for frequent coolant changes when used according to vehicle recommendations.

How does this antifreeze protect European engines?

The PEAK OET Pink OAT coolant uses organic acid inhibitors to control electrochemical corrosion and protect aluminum, brass, and soldered joints commonly found in European radiators and components. Its silicate-free composition avoids deposits that can form with older formulations, keeping passages clear and coolant flow steady.

• Advanced corrosion inhibitors targeted for aluminum-heavy systems
• Silicate-free OAT chemistry reduces deposit formation
• Meets extended-life performance expectations when installed after a proper flush
• Contains Denatonium Benzoate to deter accidental ingestion

Is the 50/50 prediluted mix ready to use, and when should I top off?

Yes — the product is shipped as a 50/50 coolant/water mixture so it’s ready to pour into the radiator or overflow reservoir without additional mixing. Use it for routine top-offs or for flushing and refilling the cooling system, following the vehicle manufacturer’s service intervals and coolant capacity guidelines.

• Ready-to-use 50/50 mix—no need to add water
• Good for quick top-offs to restore correct coolant concentration
• Follow vehicle manual when performing a full flush and fill
• One gallon covers common top-off and partial refill needs

Which vehicles should use this pink OET coolant?

This PEAK OET Pink formula is recommended for European models that specify a pink, silicate-free OAT coolant—commonly found in certain Audi, Fiat, Saab, and other European makes. Always check your owner’s manual or coolant reservoir label to confirm color and specification before adding coolant.

• Suitable where manufacturer calls for pink OAT, silicate-free coolant
• Commonly compatible with many late-model European cars and light trucks
• Not recommended where silicate or hybrid formulas are specified
• Verify OEM coolant specification before use

What performance life can I expect with proper installation?

When installed as part of a full system flush and fill, PEAK guarantees service-life protection up to 150,000 miles or 5 years. Routine checks and maintaining the correct concentration help ensure corrosion protection and system reliability over that service interval.

• Guaranteed up to 150,000 miles or 5 years after proper flush and fill
• Regular inspections recommended to monitor levels and condition
• Compatible with other extended-life coolants, but mixing can affect life expectancy
• Follow manufacturer guidance for testing coolant concentration

Who is this for: PEAK OET Extended Life Pink 50/50 prediluted antifreeze/coolant is aimed at owners and technicians of European cars that require a silicate-free OAT pink coolant—especially those who want a ready-to-use 1 gallon option for top-offs, routine maintenance, or post-flush refills. It suits DIY enthusiasts who prefer a premixed product and shops performing service on aluminum-intensive cooling systems, provided the vehicle’s specifications match this OAT formulation.