Anyone have any problems with Peak ready use antifreeze. When I was filling the radiator I noticed Brown sludge coming out of the antifreeze jug as I was pouring it into the funnel. I had already put in 2 1/2 gallons before I noticed this. I then proceeded to filter the remaining contents of that jug along with the other 3 remaining and holy s t I could not believe the crap that came out. The jugs were sealed with the foil top. I don't know how this got into all 6 jugs. Does anyone know what that sludge is?And will it harm my engine? Thanks,Gregg