Well, I have an 89 GT with jus over 100,000 miles on it. The problem is when the engine runs for a while, i can literally fog the entire road up with white smoke out the exhaust, its horrible. I checked the oil and its way past full and mixed with water. Does this mean a blown head gasket? If so, when i go to put head gaskets on, is there any type of sealer i should use like rtv or something? How about on the intake, any sealers besides gasket? Thanks.