Kindly note that actual product color may vary from the images shown.It is a 50/50 volume mixture of original ACDelco dexcool products concentrate with deionized water.ACDelco dexcool extended life coolant 50/50 pre-mixed is an ethylene glycol based, automotive engine coolant using a unique carboxylate inhibitor system.Product has a storage life in un-open/un-used condition for minimum 8 years.Protect against rust, corrosion and premature water pump failure.Protect all engine metals, including aluminum and ferrous alloys.Non-silicate formula retains excellent heat transfer characteristics for optimum water pump life.Specially formulated optimum service intervals, the coolant can last up to 5 years or 250,000 km, whichever comes first.