While doing some work underneath the car recently, I noticed some light oil around the oil pan. I've never noticed a puddle or stains in my driveway or anything.
I just got to school yesterday and was driving the car last night & noticed the Low Oil light came on. The oil & filter were changed ~800 miles ago.
I pulled the dipstick & sure enough the oil was extremely low.
(Luckily, I have a 1/2 quart of Mobil1 left over from my last change that I just happened to throw in the trunk of the car!)
Since I'm at school, I have no access to a jack or lift or anything, so I can't really get underneath there and inspect too well.
Someone said that the Rear Main Seal is a common problem on these cars. I'd like to know what other possibilities are and a rough idea of how much this repair is going to cost...
*EDIT*
I just went outside to grab something from the trunk & thought I'd look under the car. From what I could see, there is a big round oil stain on the ground, located between the headers. I could see the front of the oil pan, and that too had oil on it. There was some oil on the bottom of the Y-pipe as well. I looked around and saw that there was a trail of oil that lead to my parking spot, outlining how I had entered the parking lot.
I just pulled the dipstick and there is *zero* oil on it. 
**Edit**
I just checked & the leak is not coming from the oil filter, and the drain plug is tight. Following the trail, it seems to be from the top-side of the oil pan, and slightly more on the passenger-side than the driver's side.
Any help at all is appreciated. Thanks guys