Today i was driving down the road and my car lost a lot of power and started running like shit. I drove it back home and when it cooled of i opened the radiator cap and found oil all in there. I am assuming that it is a blown head gasket or intake gasket. There is no antifreeze leaking for the intake though. This is the second time this has happened to me with is 55000 miles. I bought the car with a blown headgasket and i repaced it. Then at 169000 I rebuit the motor and changed everthing inside the most I could without having the computer reprogramed. I had a optispark plug for the distributor go bad and it kept on popping off and cutting the car off. Could that have made the head gasket blow?