Hi I have a 2001 2.5rs that recently began to overheat with the heater off or going fast. I'm pretty damned sure it's a head gasket. The radiator seems to be lined with oil but noon cream at all just little strands of black. Radiator is full and coolant is green. Also before it started to do this I broke my manifold studs that hold your headers on. Ive been driving it a little while like that I thought maybe loss of compression could Have caused a bhg. Also I run full synthetic oil with Lucas synthetic oil stabilizer. I read somewhere that this could be cause a little leeakage in my engine and maybe to switch to a heavier weight conventional oil and may help solve my problem? I really have no idea where to start. I'm only a novice mechanic and I'd rather admit That and get someone who really knows what's going on opinion because my car is my baby and Id have to commit suicide if my imcompetence ruined my car. Got about 500 to fix this..