STARFIRE PUREFLEET HEAVY DUTY ELC ANTIFREEZE/COOLANT is a premium, virgin, ethylene glycol-based heavy duty product that is designed for use in ANY diesel-powered truck, farm, off-road, marine or gasoline engine with aluminum and other engine metals. A 50/50 mixture of STARFIRE Antifreeze/Coolant and water provides freeze protection to -34˚F and raises boiling point to +265˚F when a 15 lb. pressure cap in good condition is used. STARFIRE Purefleet Heavy Duty ELC Antifreeze/Coolant is designed for use in all heavy duty cooling system applications, including truck, farm, off-road and/or marine engine. It provides extended life protection up to 300,000 miles or 6,000 hours, when flushed and filled according to directions