I have a 200 Chevy Prizm that would spray oil if driving on freeway at over 60 MPH . It only happens at high speed in city its ok, also seems like the leak is like oil is sprayed from unknown location under the hood. If anyone knows about this issue please help me I have added a quart about every hundred mile and that no fun. Oil do not leak from the pan or any gasket that i can see. Thanks