Oil collecting on bottom of the pan (and bottom of some of the pan bolt heads). For an hour i tried to trace where it was coming from, but so far i have been unable to. I believe it to be a minor leak (no noticable oil level loss on the stick after a week of driving). Have any of you tried those oil dye products that optionally come with glasses? Do they really work? Does anyone know if this model year ford escape (with v6) has a history of oil pan gasket leaks?