so i basically got screwed over on my most recent car purchase my poor 300E runs preaty bad i dont know what to do all the cylinders have perfect compression 120psi each but the thing leaks oil everywhere and the spark plugs are covered in oil and are so gunked up and black that the thing runs real bad. about a week ago i started up the car, let it sit in the driveway for about 1/2 hr and then reved up the engine and the car started smoking sooo bad and i had to drive it about a mile before it would stop. any ideas help?