Join Date: Feb 2012
Location: North Clarendon VT
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I copied the above from Caterpillar. Extended Life Coolant incorporates advanced formula technology with organic additive corrosion inhibitors. It is free of nitrates, silicates, phosphates, borated, and amines. Instead, ELC uses mono- and dibasic organic acid salts to provide maximum protection of the six basic metal alloys - copper, solder, brass, steel, cast iron, and aluminum - found in most heat transfer systems. Some nitrites and molybdates are added to help protect the iron components in the cooling system.
Since ELC doesn't contain phosphates or silicates, hard water deposits in the cooling system are practically eliminated, and the low level of total dissolved solids improves water pump seal life. ELC's advanced technology also prevents gel formation and provides excellent protection against cylinder liner cavitation corrosion.
Plus, additives used in ELC don't deplete as fast as those in conventional coolants. Coolant life in heavy-duty diesel engines is limited by the depletion of the corrosion inhibitors. In conventional coolants, supplemental coolant additives (SCAs) deplete, so heavy-duty diesel engine manufacturers require that you add SCA's at every oil change. With ELC, however, additives deplete much more slowly - so you don't need to add any SCAs.