One, it was toxic and people used to just dump it in the ground. Toyota (and others) stopped using this for several reasons. Know that green coolant is proposed of ethylene glycol which aids in the freezing point of the substance and it was widely used for a very long time.
This type of coolant has never been or never will be in Toyota Prius, we will get to that in a minute why. This mentality along with the need to make vehicles have longer service life, eventually led to one of the reasons car makers stopped using this coolant. If it was not causing them problems, why change it. This is another reason to do your homework on all your fluids for your vehicle.ĭue to the nature of this coolant, most manufacturers (including Toyota) recommended a 30,000 mile service interval, which about 90% of consumers more than likely avoided. This causes leaks and can lead to very costly repairs. Also, once the additives are depleted the coolant can be conductive and cause electrolysis that electrically eats away at aluminum and iron surfaces. These chemicals are also very toxic to the environment. It has silicate and phosphate additives that provides protection for aluminum and bare iron surfaces. The traditional type of anti-freeze most commonly used in North America is known as "green" coolant mainly because of the color it is. The Green Machine, The Coolant That Came Before We will talk about the HOATS and the OATS and the Green stuff as well. I want to walk you through what coolant you are supposed to use for your Prius (any hybrid for that matter) and why you must pay attention to what goes in it. Today, however, it is not especially when it comes to hybrids and your gem of a car, the Toyota Prius. Doing this 40 years ago would have perfectly fine. Most people would waltz into a store thinking nothing of the sort and probably pick up a jug of their favorite green stuff and then proceed to fill their cooling system with it. It may come as a surprise that all engine coolants are not the same.
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