It is commonly sold under the name "Dexcool". You can find it in almost any parts house, or even at Walmart. You can also mix the "Any color" type, (I don't like to do this except in an emergency) but DO NOT mix regular ethyline glycol (the old green or yellow) with the Dexcool. It can really do a serious number on your radiator and heater core. It will actually form a kind of jelly in the system, and cost big money to have it cleaned out.