I took my jeep to a mechanic referred to me by a dealership. I had a very small oil leak which looked to me to be from the rear main seal. (I am no mechanic and after reviewing the threads in this forum came to this conclusion so may be no merit with my assessment ) The mechanic told me it was a valve cover gasket and a loose oil filter. He also stated I needed an oil change. So gave the go ahead to replace gasket and perform an oil change. Get Jeep back, still see droplets under the jeep, contact the mechanic, who stated give it a couple of days because he said he cleaned the engine with some brake cleaner and is just the residual cleaner that may be dripping from the engine. After a couple of days of monitoring the oil leak is gone... I did look over the engine and it appears to be a new valve cover gasket installed, and I checked the oil which is golden in color but it appears to be overfilled. The mechanic seemed to be a nice guy but I am just weary of garages that a dealer sends you to. Any ideas to verify if anything added to the oil or am I just being overly paranoid? Any type of distinct smell or color I could detect any contaminants? Thanks to all who respond!