For older model domestic & foreign cars & light duty trucks. Low silicate. Aluminum compatible. STP All Season Antifreeze Coolant 50/50 Pre-diluted is a superior quality ethylene glycol based engine coolant with a low silicate corrosion inhibitor package. This product protects coolant system metals, including heat-rejecting aluminum, against pitting caused by cavitation and corrosion. It provides protection against radiator freeze-up down to -34 degrees F and boil over to 264 degrees F (with a 100 kilopascal [15 psi] radiator cap in good condition). It is recommended for use in older model domestic and foreign cars and light duty trucks and will provide up to 50,000 miles or 2 years service life when installed as initial fill, or after a complete flush and cleaning of a cooling system in reasonable condition. It is compatible with supplemental coolant additives (SCA) and coolant filters and thus can be used in heavy duty diesel coolant systems when pre-charged with SCA. ASTP All Season Antifreeze Coolant 50/50 Pre-diluted meets the performance requirements of the following engine antifreeze/coolant specifications: ASTM AD3306, D4985; GM 1825M, 1899M; DaimlerChrysler MS7170; TMC RP 302B; Ford ESE-M97B44-A. Made in Canada.