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Mobil Delvac extended life 50 50 prediluted coolant antifreeze

Mobil Delvac™ Extended Life Coolant/Antifreeze

Providing corrosion protection of all cooling metals

Mobil Delvac Extended Life Coolant/Antifreeze is a phosphate-free, silicate-free, nitrite-free and borate-free ethylene glycol base coolant that is designed to provide exceptional wet sleeve liner cavitation and corrosion protection of all cooling system metals.

Mobil Delvac Extended Life Coolant/Antifreeze is formulated with organic corrosion inhibitors to provide total cooling system protection for 1,000,000 miles of on-road use (8 years or 20,000 hours of off-highway use). Since the organic corrosion inhibitors do not readily deplete, Mobil Delvac Extended Life Coolant/Antifreeze eliminates the need for Supplemental Coolant Additives (SCAs) as required when using conventional coolants.

Mobil Delvac™ Extended Life Coolant/Antifreeze is recommended by ExxonMobil for use in:

  • All types of heavy-duty diesel, gasoline and natural gas engines
  • Stationary engine applications regardless of fuel type being used
  • Marine cooling systems where freeze protection is needed
  • Mixed fleets where both light-duty and heavy-duty trucks are present

Features and benefits

  • Long service life: 1,000,000 miles of on-road use (8 years or 20,000 hours of off-highway use)
  • Designed for use in engines running EGR, SCR and ACERT technologies that can increase cooling system temperatures
  • Eliminates the cost of SCAs, test strips and manpower required to test the coolant and add SCAs
  • Can accept up to 25% mixing with conventional coolant technologies, with no detrimental effect to corrosion protection or reducing the extended life properties
  • Fully compatible with other quality Organic Acid Technology (OAT) and Nitrited Organic Acid Technology (NOAT) heavy-duty extended life coolants
  • Non-abrasive formula can improve water pump seal life
  • Optimal hard water compatibility and reduced hard water scale
  • Provides outstanding long-term elastomer compatibility


  • Details

    Specifications and approvals

    Mobil Delvac™ Extended Life Coolant/Antifreeze is recommended by ExxonMobil for use in applications requiring:

    • ASTM D 6210
    • ASTM D 7583
    • Behr Radiator
    • CAT EC-1
    • Cummins CES 14603
    • Detroit Diesel 93K217
    • John Deere H24A2, H24C2
    • MAN 324 Type SNF
    • Mercedes Benz 326.3
    • Mercedes Benz DBL 7700
    • MTU 5048
    • Navistar CEMS-B1-Type IIIa
    • TMC RP 329
    Meets the performance requirements of:
    • Volvo/Mack
    • Paccar
    • Phosphate-free requirements of European original equipment manufacturers (OEMs)
    • Silicate-free requirements of Japanese OEMs

    Technical details

    Concentration Protects From
    Freezing Down To Boiling Up To*
    40 -24°C/-11°F 127°C/261°F        
    50 -37°C/-34°F 129°C/265°F
    60 -52°C/-62°F 132°C/270°F


    Property ASTM Test Method Typical Values For Mobil Delvac Coolant/Antifreeze
    Specific Gravity (60/60˚F) D1122 1.130 – 1.141
    Freezing Point, 50 Vol. %, °F D3321 or D1177 -34 °F
    Boiling Point, 50 Vol. %, °F* D1120 265 °F
    PH, 50 Vol. % D1287 8.0 – 9.0
    Reserve Alkalinity D1121 8.0 – 12.0
    Foam Test D1881 150 ml./5 sec., Max
    Color Visual Red

    * Using a 15 PSI Pressure Cap



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