Genuine toyota 50/50 pre-mixed anti rust anti freeze /super long life coolant is a new generation ethylene glycol-based premium engine coolant, offering excellent corrosion protection and formulated specifically for all toyota engine-coolanr system and meets all toyota warranty requirements. it also helps prevent freeze-ups to 37'c and boil-overs .for vehicles filled with super long life coolant at the plant, it is highly recommend that super long life coolant be used for maintenance.