well im not sure why i cna't see posts past september - so ill try this agian. Woudl anyone have any ideas as to why my antifreeze in my reservoir has the consistency of a fresh cappucino? every 5-6 months or so, my low coolant light comes on - i add some, no big deal. I havent been able to find a leak anywhere, bu ti added stopleak 4 months or so ago, it just clotted up and gathered in my reservoir - stuff looks nasty. Anyway, just curiosu about the incredibly foamy aspects and what the deal might be. Thanks Tim