ShellZone DEX-COOL® Extended Life Antifreeze/Coolant is a single-phase, ethylene glycol based, extended life, universal automotive engine coolant based on a unique extended life carboxylate inhibitor system. ShellZone DEX-COOL® is suitable for a five year or 150,000 mile service life in automotive applications. In heavy-duty applications not requiring nitrite Shell DEX-COOL is suitable for a service life of 400,000 miles or 8,000 hours. Shell DEX-COOL Prediluted 50/50 is a 50/50 volume mixture of ShellZone DEX-COOL with deionized water. QTY: 6 - 1 Gallon Containers per case.  *Disposal of used antifreeze/coolant: Follow local laws and regulations. If required, dispose at facilities licensed to accept household hazardous waste. If permitted, dispose in sanitary sewer systems. Do not discard into storm sewers, septic systems or onto the ground.