Yesterday afternoon I backed my car out of the garage to sweep out some leaves, dust and dirt and I noticed a stain on the floor. I finished sweeping out the garage and pulled my car back in to the garage. I looked underneath to see if I could find the source of the stain and I noticed oil accumulating on what I think is the drain plug. The oil was changed back in December and other than that there has been no work on the car. I assume that the first thing to check would be the drain plug itself to make sure its tight. I would have done that yesterday but the exhaust was too hot.

If I can post a picture later today I will.

The car has 30K miles on it and had the engine replaced about 15K miles ago. I'm wondering what else could it possibly be - I realize that's not much information but who knows.

I hope it turns out to be something really stupid, like when the coolant resevoir started to leak. My and the mechanic's first thought was that coolant was leaking from the exhaust pipes. Turned out that it was just dripping on the pipe and running to the end where it was dripping off.

 

If the oil is right at the drain plug, you can tighten it and make sure a new crush washer is used next time.

If the oil is in front of the oil pan and dead center, you could have RMS.

If the oil is on L or R of oil pan, it could be cam seals or loose plugs.

Let the engine cool and jack up the car (with proper jacks -- not the scissor jacks in trunk) or drop up to a ramp. Get some good clearance to really inspect the source of leak. Headers and engine will cool faster if you open the hood.