Prestone Cor-Guard® Command® Nitrite Free (NF-OAT) Extended Life (ELC) antifreeze+coolant is designed to work with all Class 1-8 vehicles; Heavy Duty and Light Duty. Utilizing Cor-Guard® technology, this formula is designed to protect cooling system parts from corrosion and damage.

Features:

• Cor-Guard® increases uptime by instantly stopping the spread of rust, corrosion, pitting, gunk, grime, and buildup.
• Formulated for use in all Heavy and Light Duty engines
• Eliminates the need to add supplemental coolant additives
• Service Life 1,000,000 miles/20,000 hours – HD applications only
• Works with all metals, rubber, elastomers, & seals