Peak Final Charge - Concentrate Formula (not 50/50)
From FICMrepair.com

FINAL CHARGE® Global Extended Life Coolant/Antifreeze
Take care of your truck and it will take care of you!
Peak Final Charge Coolant features a patented Organic Acid Technology (OAT) that delivers total cooling system protection for 600,000 miles of on-road use (6 years of 12,000 hours or off-highway use) without the use of Supplemental Coolant Additives (SCAs).
** For a 6.0 Application, use two gallons and then top off your system with distilled water.
To maintain the protection provided by FINAL CHARGE Global Extended Life Coolant/Antifreeze, the proper level of FINAL CHARGE coolant’s patented inhibitor system must be present. This can be achieved by adding FINAL CHARGE Extender after 300,000 miles of on-road use (3 years or 6,000 hours of off-highway use). When required, top-off the cooling system with FINAL CHARGE concentrate or FINAL CHARGE® Global Extended Life 50/50 Pre-DilutedCoolant/Antifreeze and maintain the freeze point between -23° F and -62° F in the cooling system. FINAL CHARGE Global Extended Life Coolant/Antifreeze is a phosphate-free, silicate-free, nitrite-free and borate-free, globally formulated coolant which uses proprietary organic corrosion inhibitors to provide outstanding long-term wet sleeve liner cavitation and corrosion protection of all cooling system metals.