I usually use the good old green stuff. But how about that orange stuff that is out there. It is labeled extended life. It looks good to drink /forums/images/icons/smile.gif But how about for my radiator?
I prefer neither unless I'm going somewhere that it gets cold. In So Fla, I just use distilled water with the rust inhibiter and pump lubricant. Pure water cools better and distilled leaves no minerals or junk in the cooling tubes!
Not sure if this is the stuff you are referring to, but I know that some of antifreeze formulated for newer cars can be hard on gaskets in our old engines; at least that's what I've heard from a couple sources.
There was a good article a couple months ago in Car and Driver about the difference. Orange is for newer cars and has some chemicals that can screw up the radiators in older cars. Green is ok in anything.
I am not an expert on this , but I'd be willing to bet that using the orange stuff would not harm your car any more than the green stuff would. I have green in my GTO, green in my GMC, but the Mustang I have the orange.The only thing I don't like about the orange is: I always think of rust when I look in the radiator.