The color of healthy engine coolant is green (for ethylene glycol) or orange (for Dexcool). A milky color indicates the presence of oil in the system. This is not good; it usually means that a head gasket, intake manifold, or transmission oil cooler is leaking oil or transmission fluid into the engine coolant.
Similarly, what color is Prestone antifreeze coolant?
Newer coolants such as Prestone, based solely on the OAT chemical make-up, now offer a 10-year or 150,000-mile change interval thanks to their superior corrosion protection. Prestone is yellow, but many other coolant manufacturers use different colours.
What color is the antifreeze?
OAT coolants are currently easily available from most auto parts stores. Hybrid Organic Acid Technology or HOAT: This coolant is usually dyed yellow but comes in other colors like green, pink, blue, red and orange, which leads to a lot of confusion.
What color is extended life antifreeze?
Its first dye colors were orange and red. These dye colors are still used by General Motors and Caterpillar. Green, pink and blue have been added to the list of available OAT antifreezes. It is recommended that OAT not be mixed with any other antifreeze technology.