TRUECOLOR antifreeze / engine coolant  may be used in virtually any engine cooling system. This technology is well proven over decades of use, and is essentially engineered to resemble the extended life coolants used in some OEM’s as factory fill. BTHOAT inhibitor chemistry meets ASTM D3306 (in virgin glycol), ASTM D6210 and TMC RP-329 (EG) or RP-330 (PG).  In properly recycled engine coolant BTHOAT is designed to meet ASTM D6471 (pre diluted) or ASTM D6472 (concentrate).  The BTHOAT chemistry is compatible with most types of coolant on the market today as well as other hybrid technology coolants.  This type of coolant is sometimes referred to as “heavy duty extended life”, “global extended service” or “HOAT”.  TRUECOLOR, if used as directed, will provide satisfactory performance in most cars and trucks.