Today's coolant market is confusing. In days past all coolant was the green ethylene glycol variety, but not anymore. Now it seems that every car manufacturer has at least one color of coolant.
What Type of Antifreeze Should I Use?
All Makes and Models
Extended Life 150,000 Miles
Green, Red, Yellow, Orange, Pink, Blue
There are a lot of coolant types to choose from when you go to a well stocked auto parts store, so which one works best in your car? The simple answer is, well, simple: use what came in your car. However, sometimes it may be difficult to decipher what the original equipment manufacturer (OEM) used, especially if you purchased your car used.
- IAT - Used in early to mid-late 90's Domestic vehicles
- OAT - Used in late 90's GM and most Asian vehicles
- HOAT - Used in 2000's Fords, Chryslers, and most European vehicles
Although you can mix coolant types without harm, it is highly recommended against. If you mix an OAT or HOAT with an IAT, you will lose the extended service life of the OAT or HOAT coolant. Some people say that if you mix these types of coolant it can result in the coolant gelling, but if you keep your cooling system well maintained, this should not be a problem. In general, do not make coolant cocktails!
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