I changed oil in my wifes car last week and used Mobil 1 for the first time since we bought it at 58K mi. It now has 65K mi. I did overfill it slightly maybe I added 6.1 qts as close as I could measure 0.1 quarts. After filling it, it showed just a 1/8 inch over the top notch on the dipstick. Anyway I kept a watch on the oil level for a few days and didn't notice any decrease. Tonight I was under the car looking at some steering work that I was planning to do this weekend. I noticed oil all over about everything under the car, the sway bar, the left body rail most of the way back. The bottom of the oil pan had some fresh oil on it. I touched it and it looked light brown just like motor oil. I'm taking it to a real mechanic tomorrow to get a pro opinion of what's wrong. The oil level is still showing a slight bit above. Does anyone have any idea what might have happened. Can a small overfill damage anything?