Description:

Valvoline ZEREX Extended Life HD antifreeze coolant meets Cummins 14603, DDC, Terex, Cat? EC-1 and other heavy duty diesel engine requirements. Fully formulated ZEREX™ Extended Life HD incorporates organic acid technology and heavy duty corrosion inhibitors to protect diesel engines from liner pitting and hard water scale deposits for 3 years, 7000 hours or 300,000 miles on initial fill. The patented* chemistry protects all cooling system metals from corrosion including aluminum. ZEREX™ Extended Life HD can be used in gasoline engines, stationary power, marine, and light duty applications.

A 50% to 70% concentration range is suggested for optimum performance. ZEREX™ Extended Life HD is compatible with major long life and conventional brands of ethylene glycol based coolant. However, long life characteristics may be diminished by mixing with light duty or non-fully formulated coolants. Applications requiring a water filter should use blank filters (without SCA/DCA) and follow engine manufacturers filter change guidelines. Valvoline recommends always topping off with ZEREX™ Extended Life HD coolant, keeping the system full, and using 3 way test strips to check concentration and freeze point regularly. Add one bottle of ZEREX Extender per 50 quarts of system capacity at 300,000 miles, 3 years or 7000 hours for another equivalent distance/time. Replace the fluid after one extender cycle, 6 years/600,000 miles or 14,000 hours.