EXTENDED LIFE ANTIFREEZE/COOLANT
Prestone Command® Heavy Duty Nitrite Free Extended Life and 50/50 Antifreeze/Coolant are Organic Acid Technology (OAT) for use and compatible with ANY OAT extended life heavy duty antifreeze/coolant in ANY diesel-powered commercial vehicle engine or stationary engine. Its advanced, patented formulation is a concentrated blend of premium long-lasting inhibitors to provide up to 750,000 miles/15,000 hours* of protection against temperature extremes, rust, corrosion, scale, and premature water pump failure.
*To achieve 750K mile extended service life, follow these steps. Step 1: Perform a cooling system flush and then fill the cooling system with the proper mixture of Prestone Command® Nitrite Free coolant and high quality water. Step 2: As coolant level drops through normal engine use, top up using only Prestone Command® Nitrite Free prediluted coolant as necessary. Step 3: Test coolant at least twice a year, Spring & Fall, every PM is preferred – use a refractometer to make sure your coolant is adjusted to the correct coolant/water mixture and then use test strips to assess nitrite contamination (nitrite contamination can occur when adding a Nitrite Organic Acid Technology (NOAT) to a OAT), and test pH. Use new coolant if replacing a cooling system part.
NITRITE FREE EXTENDED LIFE TECHNOLOGY
When used as directed, Prestone Command® Heavy Duty Nitrite Free ELC formulations provide long-lasting inhibition and corrosion protection. For additional product specifications, please reference our product data sheets.
General Description
Composition | Typical Values |
---|---|
Ethylene Glycol and Inhibitors: | |
Concentrate | 97.9% |
50 vol % | 51% |
Water: | |
Concentrate | 2.1% |
50 vol % | 49% |
Dyes | Trace |
Color | Yellow |
Odor | Characteristic |
Pack/Unit | Jug / Drum / Tote |
Average Fluid Weight/Unitat 68°F (20°C): | |
Concentrate | 9.3 lb (4.2 kg) / gal (3.78 L) |
50 vol % | 8.9 lb (4.0 kg) / gal (3.78 L) |

Features & Benefits
- Compatible with ANY OAT Extended Life heavy duty antifreeze/coolant
- Provides excellent protection for aluminum and all other engine metals
- Complete liner pitting and corrosion protection
- Service life 750,000 miles/15,000 hours
- Helps lower maintenance costs and improve water pump life
- Eliminates the need to add supplemental coolant additives or use a SCA charged coolant filter

Savings Calculator
Using our simple calculator, see how your fleet can save with Prestone Command.