Might have a problem

[Hard_Core_Hick]

Ok my truck hasent seen the road scince August and its kinda been sitting there , i have started it up and let it run so nothing went wrong with it , so i decided to do a littile checking on the underbody for the hell of it and on my " Y " pipe i noticed what looked to be soaked in oil , any one got any ideas to what it could be , i have a couple ideas such as the oil plug was tightend in to far or maybe a blown ring any one have the same problem or is it just me please help