On my new to me 29 Sport Coupe I changed the oil before starting it for the first time. I recently noticed it has an oil leak. It was not doing this before I changed the oil. At first I suspected the drain plug but it doesn't seem to be coming from that. This is a pretty substantial leak. It's leaving a nice slick on my floor and I can tell it's fresh oil. It seems to have stopped after not running it for a few days. I put a full 5 qts of oil in the car but now I am wondering if I should have only put 4.5 in? Could having too much oil in it cause it to leak?