Zerex G48 Blue Coolant - 1 Gallon

Zerex G48 Blue Coolant - 1 Gallon

OEM-Approved Protection for European and High-Performance Engines

Ensure your cooling system operates with factory-level precision using Zerex G48. This dark blue formula is the preferred choice for BMW, Mercedes-Benz, and several other European manufacturers who specify the G48 standard (TL-774-C). By utilizing a NAP-free (Nitrite, Amine, Phosphate-free) chemistry, it prevents the formation of hard water scale and protects against the four main causes of cooling system failure: corrosion, leaking, deposits, and extreme temperature fluctuations. Whether you are performing a full system flush or a simple seasonal top-off, Zerex G48 offers the exact chemical profile needed to maintain warranty compliance and maximize engine life.

Available Variants:

- G48 Concentrate (861583): A full-strength formula that must be mixed with distilled water. This is the most cost-effective option for a complete system flush or for users who need to customize their freeze protection levels.

- G48 50/50 Pre-Mix (875537): A ready-to-use solution pre-diluted with deionized water. Perfect for quick top-offs or for users who want to avoid the mess and guesswork of mixing their own ratio.

The Zerex Advantage

- OEM Approved Chemistry: This is the precise factory-fill chemistry for many European brands, ensuring your gaskets, hoses, and plastics remain safe from chemical degradation.

- HOAT Technology: Combines the fast-acting protection of inorganic inhibitors with the long-lasting life of organic acid technology for up to 5 years or 150,000 miles of protection.

- Unsurpassed Thermal Stability: Provides a massive safety margin against summer boil-overs and winter freeze-ups, maintaining a stable operating temperature under heavy loads.

- Advanced Metal Protection: Specifically formulated to protect aluminum, cast iron, steel, copper, and brass from rust and cavitation.

- Deposit Control: Specialized additives guard against hard water scale and deposits, ensuring that your radiator and water pump remain clear and functional.

Product Specifications

- Color: Dark Blue

- Chemistry: Hybrid Organic Acid Technology (HOAT)

- Freezing Protection: Down to -34 F (at 50/50 ratio)

- Boiling Protection: Up to 265 F (at 50/50 ratio)

- Standards: Meets ASTM D3306, ASTM D4985, SAE J1034

- Approvals: BMW N 600 69.0, MB-Approval 325.0, Audi/VW TL-774-C

Primary Vehicle Compatibility

- BMW (All models requiring Blue Coolant)

- Mercedes-Benz (Specification 325.0)

- Mini (All models)

- Volvo / Tesla / Porsche (Select models)

Precision Tip: When using the Concentrate variant, always mix with distilled or deionized water rather than tap water. Tap water contains minerals that can react with the coolant additives, leading to scale buildup and reduced cooling efficiency. If you are switching to G48 from a different coolant type, a full system flush is highly recommended to ensure the internal corrosion inhibitors can bond properly to the metal surfaces without cross-contamination.