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Ultimate Freeze Protection for Extreme Cold Conditions

What Is Fleetguard 70:30 Coolant?

Fleetguard 70:30 Coolant is a premium pre-diluted heavy-duty engine coolant, factory-mixed at a specialized ratio of 70% high-quality ethylene glycol-based antifreeze and 30% deionized purified water. Unlike the standard 50:50 blend, this higher-concentration formula is engineered specifically for extreme cold climates, delivering maximum freeze protection while maintaining reliable corrosion and overheating protection.

Produced by Fleetguard — a Cummins Inc. brand and the trusted choice of major engine manufacturers worldwide — this coolant combines advanced inhibitor technology with a precisely balanced glycol concentration, making it ideal for heavy-duty diesel engines, commercial fleets, and equipment operating in sub-zero environments.

Key Benefits of Fleetguard 70:30 Coolant

✅ Maximum Freeze Protection for Extreme Cold

The 70:30 formulation provides industry-leading freeze protection:

  • Protects down to approximately -57°C (-70°F) — far beyond what a standard 50:50 mix can offer.
  • Safeguards engines from freezing and catastrophic block cracking in Arctic, high-altitude, or severe winter conditions.
  • Ensures reliable startup and operation even when temperatures plunge far below freezing.

✅ Enhanced High-Performance Formulation

  • Boiling point elevated to approximately 104°C–105°C — still delivering dependable overheating protection under normal and heavy loads.
  • Advanced corrosion inhibitors protect cast iron, aluminum, copper, brass, and solder across the entire cooling system — including water pumps, cylinder heads, engine blocks, gaskets, and seals.
  • Prevents rust, scale formation, cavitation, and liner pitting — critical for extending engine life and reducing maintenance costs.

✅ Factory-Precision Mix, Ready to Use

  • Pre-mixed at the optimal 70:30 ratio — eliminates guesswork, measuring, and errors during manual mixing.
  • Contains only deionized purified water — no tap water impurities to cause scaling or corrosion.
  • Consistent quality in every batch, meeting or exceeding major OEM specifications including Cummins, Detroit Diesel, and more.

✅ Broad Compatibility & Heavy-Duty Design

  • Formulated for heavy-duty diesel, gasoline, and natural gas engines.
  • Fully compatible with all other Fleetguard coolants, Supplemental Coolant Additives (SCAs), and coolant filters.
  • Safe for elastomers, seals, and gaskets — prevents leaks and component degradation.
  • Ideal for trucks, buses, construction equipment, agricultural machinery, and stationary power units operating in cold regions.

✅ Long Service Life & Reduced Maintenance

  • Advanced inhibitor chemistry maintains protection over extended service intervals.
  • When used as directed alongside routine coolant analysis, it reduces downtime and total cost of ownership.
  • Meets strict industry standards including ASTM D3306 / D6210 and OEM requirements.