Heavy Duty Nitrite Free Extended Life Coolant (ELC) with Cor-Guard® Inhibitors

1,000,000 MILE / 20,000 HOUR SERVICE LIFE*

Prestone Command® Heavy Duty Nitrite Free ELC with Cor-Guard® Concentrate and 50/50 Antifreeze/Coolant is intended for use and 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. Its patented and advanced nitrite free OAT formulation is based upon a concentrated blend of premium long-lasting inhibitors designed to provide up to 1,000,000 miles / 20,000 hours* of protection against temperature extremes, rust, cavitation corrosion, scale and premature water pump failure. When used as directed, Prestone Command HD Nitrite Free ELC with Cor-Guard® may be added to any OAT antifreeze/coolant of any HD commercial or stationary engine. Meets or exceeds the performance requirements for all HD OEMs, including Cummins and Detroit Diesel.

*Provides Extended Life protection that meets the vehicles manufacturer recommended change intervals for all DOT Truck Classes, including up to 1,000,000 miles for Class 8 vehicles, when properly flushed, filled and maintained using only Prestone Heavy Duty Nitrite Free Coolant with Cor-Guard® corrosion inhibitor.

Concentrate Safety Data Sheet

Ready To Use Safety Data Sheet

Why Use Cor-Guard®?

Featuring one-of-a-kind patented technology, Cor-Guard® is formulated to work in unison with today’s hotter running engine designs and CAB heat exchangers. Prestone with Cor-Guard® ensures that all components within the cooling system are able to perform their function properly, creating optimal cooling and more consistent UPTIME!

General Description

CompositionTypical Values
Ethylene Glycol and Inhibitors:
50 vol %51%
50 vol %49%
Pack/UnitJug / Drum / Tote
Average Fluid Weight/Unitat 68°F (20°C):
Concentrate9.3 lb (4.2 kg) / gal (3.78 L)
50 vol %8.9 lb (4.0 kg) / gal (3.78 L)
Meets or Exceeds OEM Performance Requirements:
Cummins CES 14603 Volvo
Cummins Bulletin 3666132 Mack
Detroit Diesel 93K217 Freightliner
CAT EC-1 Paccar CS 0185
Navistar CEMS B-1, Type IIIA Peterbilt
International Kenworth
John Deere H24 Komatsu
John Deere H24 C1 Komatsu KES 07.892
John Deere JDS-G135 Kubota
Ford WSS-M97-B44D GM Heavy Truck
GM 6277M Chrysler/Dodge/Ram
GMW 34290 Ford WSS-M97B57-A1/A2
Features & Benefits
  • Cor-Guard® Inhibitors 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
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