Zerex Antifreeze Coolant, 1 gal., Plastic Bottle, Dilution Ratio : 50/50, -34 Freezing Point (F)

Valvoline™ ZEREX® Extended Life HD antifreeze/coolant's proprietary heavy-duty formula is designed to protect diesel engines from liner pitting and hard-water scale deposits. Organic acid technology and heavy-duty corrosion inhibitors are formulated to protect all cooling system metals, including aluminum. Also appropriate for use in gasoline engines and stationary power, marine, and light-duty applications. 3 yr./7000 hr./300,000 mi. service life; at that point, add Extended Life Extender No. 4NPP7 (sold separately) to stretch drain interval an equivalent time/distance.