HEAVY DUTY NITRITE FREE EXTENDED LIFE
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The Most technologically-advanced heavy duty antifreeze available
Prestone Command® Heavy Duty Nitrite Free ELC with Cor-Guard® Concentrate and 50/50 Antifreeze/Coolant utilizes Cor-Guard® technology formula designed to protect cooling systems from corrosion and damage. br> It's compatible with ANY nitrite free HD Organic Acid Technology (OAT) coolant in ANY diesel-powered commercial vehicle engine or stationary engine with aluminum or other engine metals.