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Commercial Extended Life Coolants for Military Ground Vehicle Usage - Market Survey Responses


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Currently, U.S. Army engine coolant is governed by Commercial Item Description (CID) A-A-52624A, which mandates the use of older conventional, supplemental coolant additive (SCA) based technology. SCA based coolant lacks key advantages of the newer more widely used Organic Acid Technology (OAT) based coolant, also known as Extended-Life Coolant (ELC). ELC has been commercially available and used in passenger cars since 1995, with General Motors being the first OEM to adopt OAT technology in their factory fills, but the Military has not yet adopted the use of OAT technology [1][2]. One disadvantage of SCA coolant is that it has a short life span of two years, and that is only if additives are reinhibited every six months. In 2015, GVSC learned from CASCOM that the reinhibition process was not occurring at field level maintenance, and instead a full flush and refill was conducted annually. This unnecessarily increases the maintenance burden and quantity of coolant being used by the Army. In contrast to conventional SCA technology, ELC generally has an increased lifespan of 150,000 miles or 5+ years of service because the additives do not deplete as quickly over time [1]-[5]. Additionally, conventional coolant technology is often said to offer less protection to aluminum engine components from cavitation corrosion and provide lower heat transfer compared to some ELCs [1][6][7]. These advances in coolant technology over the last 25 years have brought to light the need for the Army to transition from conventional to extended-life coolant.



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