500 miles ago I switched to synthetic (mobil 1) in my 4.0 tj. it only has 24,000 miles on it now, but is slowly leaking oil. It has since burned/lost about 1/3 of one quart of oil in 500 miles. When I look under the Jeep, I can see a small drip of oil coming from the bottom bolt in the front of some plate right in front of the clutch housing. There is none on the front of the plate facing the oil pan, so it must be coming from between this plate and the clutch housing. Why is it doing this, and what can I do about it? I very slightly tightened up the bottom bolt, but it hasn't stopped it. The leak is very slow, but annoying. It didn't leak with the conventional oil it used to use. Any suggestions.