Organic Acid Technology (ES Compleat™ OAT) | Cummins Filtration


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ES Compleat™ OAT (Organic Acid Technology) is a Life-of-the-Engine organic additive  fully formulated extended life Ethylene Glycol (EG) antifreeze/coolant. It is our answer to the maintenance demands of heavy duty diesel cooling systems. ES Compleat OAT EG may be used with non-chemical Extended Service Interval (ESI) water filters .

ES Compleat OAT Extended Life Antifreeze/Coolant utilizes patented organic acid technology. It provides superior diesel engine protection against freezing, boil-over, cavitation, liner pitting, erosion, corrosion, elastomer gasket degradation, and scaling.


REAL™ Performance

  • Life-of-the-Engine, 1,000,000-mile coolant
  • Provides antifreeze and antiboil protection
  •  Superior pitting and corrosion protection
  •  Provided aluminum and solder protection
  • Compatible with gaskets, elastomers and other non-metallics in the engine
  • Optimizes cooling system performance and water pump life
  • Contains proprietary scale inhibitors

REAL™ Versatility

  • Compatible with all other antifreeze/coolants
  • Choose from EG & PG formulations
  • Available in concentrate, 50/50 & 60/40 premix
  • For all heavy duty diesel, gasoline and natural gas engines

REAL™ Serviceability

  • Easy to use test strips monitor glycol and additive levels providing protection against coolant dilution


* To maintain the protection provided by ES Compleat OAT, the proper level of inhibitor must be present. This can usually be achieved by topping off the cooling system with premixed ES Compleat OAT coolant. The user is responsible for ensuring proper additive levels and coolant pH through the use of test strips and the addition of new coolant if necessary. The recommended test interval is 300,000 miles, 6,000 hours, or 1 year. The test interval is a precautionary recommendation intended to prevent progressive, severe engine damage.