Valvoline Zerex G30 50/50 Ready-to-Use Antifreeze/Coolant 1 Gal — OAT Protection, Pre-Mixed

Zerex G30 50/50 Ready-to-Use Antifreeze/Coolant by Valvoline is a pre-mixed, OAT-based engine coolant formulated to protect modern cooling systems from freezing, boiling, corrosion and deposits.

Every cooling system faces four common threats: freeze damage, overheating, corrosion and internal build-up. Zerex G30 uses a carboxylate, Organic Acid Technology (OAT) formulation in an ethylene glycol base to address those issues for many domestic and import vehicles. It arrives pre-mixed at a 50/50 concentration so you can add it directly to your radiator or use it during a complete system service without additional measuring.

How does Zerex G30 protect my engine in winter and summer?

Zerex G30 is engineered to maintain freeze and boilover protection for modern engines when used at the factory-recommended 50/50 ratio. The formulation lowers freeze point and raises boiling point to reduce the risk of coolant-related breakdowns across temperature extremes.

• Ready-to-use 50/50 mix protects down to -34°F and up to 265°F with correct system pressure.
• Ethylene glycol base provides reliable heat transfer for cold starts and hot operation.
• Pre-mixed packaging eliminates dilution errors and saves time during top-offs.

Will Zerex G30 harm aluminum radiators, water pumps, hoses, or gaskets?

The OAT carboxylate chemistry in Zerex G30 is formulated to be compatible with modern metals and non-metal components commonly used in automotive cooling systems. It’s free of silicates, phosphates, amines, borates, nitrates and nitrites, reducing the risk of additive interactions that can cause deposits or accelerated wear.

• Designed to inhibit corrosion on aluminum and other metals found in OEM systems.
• Contains additives that protect seals, hoses and plastic parts without degrading them.
• No silicates or phosphates means fewer deposits and longer component life when used as directed.

Is Zerex G30 compatible with my vehicle and how long does it last?

Zerex G30 is approved for a variety of vehicles including many Chrysler, European Ford, Fiat, GM, Jaguar, Jeep, Land Rover and Volkswagen applications, among others. It comes with a manufacturer-backed service interval and coverage that supports long-life maintenance schedules when the coolant is left in-service as recommended.

• OEM-approved formulation suited to many domestic and import engines—check your owner’s manual for compatibility.
• Intended for long-life protection with recommended maintenance intervals; Valvoline backs performance with a 5 year/150,000 mile protection statement when used properly.
• Batch-tested in labs and validated in real-world fleet use for consistent results.

How should I use Zerex G30 for topping off or a complete flush?

Because this product is sold as a ready-to-use 50/50 mix, it’s convenient for emergency top-offs and straightforward to refill after a system drain and flush. For a full system service, follow vehicle manufacturer procedures to clean and refill the cooling system and always dispose of old coolant responsibly.

• For top-offs: pour directly from the jug into a cool radiator or overflow reservoir as needed.
• For flushes: drain, flush per manual, and refill with new Zerex G30 at 50/50 concentration—no dilution required.
• Contains denatonium benzoate (30–50 ppm) to discourage accidental ingestion; handle and store safely away from children and pets.

Who is this for? Zerex G30 by Valvoline is aimed at drivers and technicians who need a long-life, OEM-aligned coolant that’s ready-to-use and formulated to protect modern engines and cooling system components. It’s especially useful for owners of compatible Chrysler, Ford (European), Fiat, GM, Jaguar, Jeep, Land Rover and Volkswagen models, and for fleet operators seeking consistent, lab-tested coolant performance that reduces corrosion, scale and cooling system failures.