FS Extended Life 50/50 Pre-Diluted OAT Coolant/Antifreeze is a 50/50 mix of Extended Life Coolant and deionized water. FS Extended Life 50/50 Pre-Diluted OAT Coolant/Antifreeze should be used when topping off cooling systems filled with Extended Life Coolant to ensure proper inhibitor levels are maintained.

FS Extended Life 50/50 Pre-Diluted OAT Coolant/Antifreeze features a patented Organic Acid Technology (OAT) formula that delivers total cooling system protection for 1,000,000 miles of on-road use (8 years or 20,000 hours of off-highway use)* without the use of supplemental coolant additives (SCAs). When required, top off the cooling system with FS Extended Life or FS Extended Life 50/50 Pre-Diluted OAT Coolant/ Antifreeze only.

FS Extended Life 50/50 Pre-Diluted OAT Coolant/Antifreeze is a phosphate-free, silicate-free, nitrate-free, borate-free approved coolant that uses patented organic acid inhibitors to provide superior wet sleeve liner cavitation and corrosion protection of cooling system metals.

Features and Benefits: 

• Delivers cooling system protection for service life:
  • Over-the-road protection:1,000,000 miles or 8 years
  • Off-road protection: 20,000 hours or 8 years
• Pre-diluted with deionized water, no need to add water at initial fill or when topping off
• To realize FS Extended Life Coolant’s maximum protection, contamination levels should be kept below 25%
• Eliminates the need for SCAs and coolant filters, saving time and money
• Provides effective long-term corrosion protection of cooling system components
• Provides exceptional long-term elastomer compatibility

*To maintain the protection provided by FS Extended Life 50/50 Pre- Diluted OAT Coolant/Antifreeze, the proper level of patented inhibitor system must be present. This can be achieved by topping off the cooling system with FS Extended Life 50/50 Pre-Diluted OAT Coolant/Antifreeze only when required and maintaining the recommended freeze point.