Zerex Extreme Extended Life antifreeze/coolant from Valvoline is reported to be the only product that meets the Cummins CES 14603 spec and the Caterpillar EC-1 spec for heavy-duty applications without the need for supplemental silicate additives at first fill. Because it is compatible with other brands of ethylene glycol-based coolants, it can be used for mixed fleets with gasoline engines. It also meets industry specs and requirements such as TMC RP-329 and ASTM D6210 and D3306 for use in diesel and gasoline engines in light truck, passenger car, stationary power, and marine applications.
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