No hard info here, but of the six Mercedes's that I've owned, all those (3) that had the green stuff when I bought them had over heating problems, and none of those (3) that had the white stuff had any cooling problems at all. Of those with the green stuff, one was a '76 300D and another is the '81 240D - so yes, it is bad in the mostly iron engines as well.
It used to be that the decreased frequency of changing the anti-freeze offset the increased cost almost exactly. I don't konw what the current prices are so - you get to figure that out. Snook - yes, that means that the 300D is heating up at over 90F outside with the air on -- -- OK Don, KD5NRO Norman, OK "The Americans will always do the right thing... after they've exhausted all the alternatives." Sir Winston Churchill '90 300D 243K, Rattled '87 300SDL 290K, Limo Lite, or blue car '81 240D 173K, Gramps, or yellow car '78 450SLC 67K, brown car '97 Ply Grand Voyager 78K Van Go
