Oil Coming from Exhaust??

I have a 1990 Honda Prelude Si...I just recently noticed that when the car is sitting with the engine running, under the exhaust pipes it is black. I believe this is oil since it has been using alot of oil lately. And I was wondering where the oil was going. This car sit for almost a year before I put a new transmission and clutch it...also had gaskets changed and tuneup(plugs,wires,filters and so on). Any ideas of what will fix this problem?

If oil is coming out of your exhaust pipe it will come out in the form of white smoke - the heat from the engine will burn up any oil way before it makes it to the tailpipe. If you're seeing a dry black soot-like build-up on your tailpipe your probably seeing burned fuel which means your engine is running too rich - you need a tune-up.