No, its not a joke. It may be a stupid question but, I will ask it anyway. I have a 96 Cutlass Supreme 3100 with Mobile 1 in the oil pan with the pink/orange antifreeze. I just cant tell if they are mixing in the engine from a bad gasket or not. Is there any other way I can figure it out? I looked at the dipstick and looking through the holes in it, it looks like it has a pink hue. The oil pan level is the same as when I changed the oil. When I had the problem before the oil level was much higher. What is the black goop in the antifreeze overflow bottle?