I recently bought a 97 GT, drove it for a week no drips or any problems. A few days back I went to one of those 15 minute oil change places and had them put in 5W20 synthetic since my original choice was 5W30 synthetic. Now, I'm getting about a drop per hour to two hours leak on my garage floor. Engine to my knowledge is running fine other than that. What should I do at this point? Is this a major concern? Kind of bummed !