Barracuda, there are two possibilities that I can think of. First, maybe it was the metal makeup of the Supertiger case. Secondly, I bought full strength Prestone from Wal-mart and maybe the formula has changed lately. My buddy said the same as you. "Wow, never heard of that before". Anyway, I was lucky it was just a Supertiger instead of my OS engines. Problem is, I was cleaning it up a bit to sell. Would like to hear what I did wrong.
Mark